diff --git a/.travis.yml b/.travis.yml
index 6429a194..59e039b3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,5 +14,6 @@ before_install:
   - # start your web application and listen on `localhost`
   - google-chrome-stable --headless --disable-gpu --remote-debugging-port=9222 http://localhost &
 install:
-  - npm install
+  - npm ci
   - npm run build
+after_success: npm run coverage
diff --git a/package-lock.json b/package-lock.json
index 553f0b2f..3ffc804c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2415,6 +2415,97 @@
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       "optional": true
     },
+    "@istanbuljs/load-nyc-config": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.0.0.tgz",
+      "integrity": "sha512-ZR0rq/f/E4f4XcgnDvtMWXCUJpi8eO0rssVhmztsZqLIEFA9UUP9zmpE0VxlM+kv/E1ul2I876Fwil2ayptDVg==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.3.1",
+        "find-up": "^4.1.0",
+        "js-yaml": "^3.13.1",
+        "resolve-from": "^5.0.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "5.3.1",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
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+          "dev": true
+        },
+        "find-up": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+          "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
+          "dev": true,
+          "requires": {
+            "locate-path": "^5.0.0",
+            "path-exists": "^4.0.0"
+          }
+        },
+        "js-yaml": {
+          "version": "3.13.1",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
+          "dev": true,
+          "requires": {
+            "argparse": "^1.0.7",
+            "esprima": "^4.0.0"
+          }
+        },
+        "locate-path": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
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+          "dev": true,
+          "requires": {
+            "p-locate": "^4.1.0"
+          }
+        },
+        "p-limit": {
+          "version": "2.2.2",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.2.2.tgz",
+          "integrity": "sha512-WGR+xHecKTr7EbUEhyLSh5Dube9JtdiG78ufaeLxTgpudf/20KqyMioIUZJAezlTIi6evxuoUs9YXc11cU+yzQ==",
+          "dev": true,
+          "requires": {
+            "p-try": "^2.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
+          "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.2.0"
+          }
+        },
+        "p-try": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+          "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
+          "dev": true
+        },
+        "path-exists": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
+          "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
+          "dev": true
+        },
+        "resolve-from": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
+          "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
+          "dev": true
+        }
+      }
+    },
+    "@istanbuljs/schema": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.2.tgz",
+      "integrity": "sha512-tsAQNx32a8CoFhjhijUIhI4kccIAgmGhy8LZMZgGfmXcpMbPRUqn5LWmgRttILi6yeGmBJd2xsPkFMs0PzgPCw==",
+      "dev": true
+    },
     "@jimp/bmp": {
       "version": "0.9.3",
       "resolved": "https://registry.npmjs.org/@jimp/bmp/-/bmp-0.9.3.tgz",
@@ -4455,6 +4546,24 @@
         "humanize-ms": "^1.2.1"
       }
     },
+    "aggregate-error": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.0.1.tgz",
+      "integrity": "sha512-quoaXsZ9/BLNae5yiNoUz+Nhkwz83GhWwtYFglcjEQB2NDHCIpApbqXxIFnm4Pq/Nvhrsq5sYJFyohrrxnTGAA==",
+      "dev": true,
+      "requires": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      },
+      "dependencies": {
+        "indent-string": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/indent-string/-/indent-string-4.0.0.tgz",
+          "integrity": "sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==",
+          "dev": true
+        }
+      }
+    },
     "ajv": {
       "version": "6.7.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.7.0.tgz",
@@ -5819,6 +5928,18 @@
         }
       }
     },
+    "caching-transform": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/caching-transform/-/caching-transform-4.0.0.tgz",
+      "integrity": "sha512-kpqOvwXnjjN44D89K5ccQC+RUrsy7jB/XLlRrx0D7/2HNcTPqzsb6XgYoErwko6QsV184CA2YgS1fxDiiDZMWA==",
+      "dev": true,
+      "requires": {
+        "hasha": "^5.0.0",
+        "make-dir": "^3.0.0",
+        "package-hash": "^4.0.0",
+        "write-file-atomic": "^3.0.0"
+      }
+    },
     "caller-callsite": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/caller-callsite/-/caller-callsite-2.0.0.tgz",
@@ -6039,6 +6160,12 @@
         }
       }
     },
+    "clean-stack": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
+      "integrity": "sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==",
+      "dev": true
+    },
     "cli-cursor": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-3.1.0.tgz",
@@ -7006,6 +7133,37 @@
         }
       }
     },
+    "coveralls": {
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.9.tgz",
+      "integrity": "sha512-nNBg3B1+4iDox5A5zqHKzUTiwl2ey4k2o0NEcVZYvl+GOSJdKBj4AJGKLv6h3SvWch7tABHePAQOSZWM9E2hMg==",
+      "dev": true,
+      "requires": {
+        "js-yaml": "^3.13.1",
+        "lcov-parse": "^1.0.0",
+        "log-driver": "^1.2.7",
+        "minimist": "^1.2.0",
+        "request": "^2.88.0"
+      },
+      "dependencies": {
+        "js-yaml": {
+          "version": "3.13.1",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
+          "dev": true,
+          "requires": {
+            "argparse": "^1.0.7",
+            "esprima": "^4.0.0"
+          }
+        },
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        }
+      }
+    },
     "create-ecdh": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/create-ecdh/-/create-ecdh-4.0.3.tgz",
@@ -8100,6 +8258,12 @@
         "next-tick": "^1.0.0"
       }
     },
+    "es6-error": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/es6-error/-/es6-error-4.1.1.tgz",
+      "integrity": "sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg==",
+      "dev": true
+    },
     "es6-iterator": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/es6-iterator/-/es6-iterator-2.0.3.tgz",
@@ -8917,6 +9081,59 @@
         "for-in": "^1.0.1"
       }
     },
+    "foreground-child": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-2.0.0.tgz",
+      "integrity": "sha512-dCIq9FpEcyQyXKCkyzmlPTFNgrCzPudOe+mhvJU5zAtlBnGVy2yKxtfsxK2tQBThwq225jcvBjpw1Gr40uzZCA==",
+      "dev": true,
+      "requires": {
+        "cross-spawn": "^7.0.0",
+        "signal-exit": "^3.0.2"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "7.0.1",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.1.tgz",
+          "integrity": "sha512-u7v4o84SwFpD32Z8IIcPZ6z1/ie24O6RU3RbtL5Y316l3KuHVPx9ItBgWQ6VlfAFnRnTtMUrsQ9MUUTuEZjogg==",
+          "dev": true,
+          "requires": {
+            "path-key": "^3.1.0",
+            "shebang-command": "^2.0.0",
+            "which": "^2.0.1"
+          }
+        },
+        "path-key": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+          "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
+          "dev": true
+        },
+        "shebang-command": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+          "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+          "dev": true,
+          "requires": {
+            "shebang-regex": "^3.0.0"
+          }
+        },
+        "shebang-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+          "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
+          "dev": true
+        },
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "forever-agent": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
@@ -8967,6 +9184,12 @@
         "readable-stream": "^2.0.0"
       }
     },
+    "fromentries": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/fromentries/-/fromentries-1.2.0.tgz",
+      "integrity": "sha512-33X7H/wdfO99GdRLLgkjUrD4geAFdq/Uv0kl3HD4da6HDixd2GUg8Mw7dahLCV9r/EARkmtYBB6Tch4EEokFTQ==",
+      "dev": true
+    },
     "fs-constants": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs-constants/-/fs-constants-1.0.0.tgz",
@@ -10523,6 +10746,24 @@
         "minimalistic-assert": "^1.0.1"
       }
     },
+    "hasha": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/hasha/-/hasha-5.1.0.tgz",
+      "integrity": "sha512-OFPDWmzPN1l7atOV1TgBVmNtBxaIysToK6Ve9DK+vT6pYuklw/nPNT+HJbZi0KDcI6vWB+9tgvZ5YD7fA3CXcA==",
+      "dev": true,
+      "requires": {
+        "is-stream": "^2.0.0",
+        "type-fest": "^0.8.0"
+      },
+      "dependencies": {
+        "is-stream": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-2.0.0.tgz",
+          "integrity": "sha512-XCoy+WlUr7d1+Z8GgSuXmpuUFC9fOhRXglJMx+dwLKTkL44Cjd4W1Z5P+BQZpr+cR93aGP4S/s7Ftw6Nd/kiEw==",
+          "dev": true
+        }
+      }
+    },
     "he": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/he/-/he-1.2.0.tgz",
@@ -10578,6 +10819,12 @@
       "integrity": "sha1-DfKTUfByEWNRXfueVUPl9u7VFi8=",
       "dev": true
     },
+    "html-escaper": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.0.tgz",
+      "integrity": "sha512-a4u9BeERWGu/S8JiWEAQcdrg9v4QArtP9keViQjGMdff20fBdd8waotXaNmODqBe6uZ3Nafi7K/ho4gCQHV3Ig==",
+      "dev": true
+    },
     "http-cache-semantics": {
       "version": "3.8.1",
       "resolved": "https://registry.npmjs.org/http-cache-semantics/-/http-cache-semantics-3.8.1.tgz",
@@ -11588,6 +11835,85 @@
         "semver": "^5.3.0"
       }
     },
+    "istanbul-lib-processinfo": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-processinfo/-/istanbul-lib-processinfo-2.0.2.tgz",
+      "integrity": "sha512-kOwpa7z9hme+IBPZMzQ5vdQj8srYgAtaRqeI48NGmAQ+/5yKiHLV0QbYqQpxsdEF0+w14SoB8YbnHKcXE2KnYw==",
+      "dev": true,
+      "requires": {
+        "archy": "^1.0.0",
+        "cross-spawn": "^7.0.0",
+        "istanbul-lib-coverage": "^3.0.0-alpha.1",
+        "make-dir": "^3.0.0",
+        "p-map": "^3.0.0",
+        "rimraf": "^3.0.0",
+        "uuid": "^3.3.3"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "7.0.1",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.1.tgz",
+          "integrity": "sha512-u7v4o84SwFpD32Z8IIcPZ6z1/ie24O6RU3RbtL5Y316l3KuHVPx9ItBgWQ6VlfAFnRnTtMUrsQ9MUUTuEZjogg==",
+          "dev": true,
+          "requires": {
+            "path-key": "^3.1.0",
+            "shebang-command": "^2.0.0",
+            "which": "^2.0.1"
+          }
+        },
+        "istanbul-lib-coverage": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.0.0.tgz",
+          "integrity": "sha512-UiUIqxMgRDET6eR+o5HbfRYP1l0hqkWOs7vNxC/mggutCMUIhWMm8gAHb8tHlyfD3/l6rlgNA5cKdDzEAf6hEg==",
+          "dev": true
+        },
+        "p-map": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-map/-/p-map-3.0.0.tgz",
+          "integrity": "sha512-d3qXVTF/s+W+CdJ5A29wywV2n8CQQYahlgz2bFiA+4eVNJbHJodPZ+/gXwPGh0bOqA+j8S+6+ckmvLGPk1QpxQ==",
+          "dev": true,
+          "requires": {
+            "aggregate-error": "^3.0.0"
+          }
+        },
+        "path-key": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+          "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
+          "dev": true
+        },
+        "shebang-command": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+          "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+          "dev": true,
+          "requires": {
+            "shebang-regex": "^3.0.0"
+          }
+        },
+        "shebang-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+          "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
+          "dev": true
+        },
+        "uuid": {
+          "version": "3.3.3",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
+          "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ==",
+          "dev": true
+        },
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "istanbul-lib-report": {
       "version": "2.0.8",
       "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-2.0.8.tgz",
@@ -12355,6 +12681,12 @@
         "invert-kv": "^1.0.0"
       }
     },
+    "lcov-parse": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/lcov-parse/-/lcov-parse-1.0.0.tgz",
+      "integrity": "sha1-6w1GtUER68VhrLTECO+TY73I9+A=",
+      "dev": true
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+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
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+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.1.0.tgz",
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+          "dev": true,
+          "requires": {
+            "cliui": "^6.0.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^4.1.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^4.2.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^16.1.0"
+          }
+        },
+        "yargs-parser": {
+          "version": "16.1.0",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-16.1.0.tgz",
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+          "dev": true,
+          "requires": {
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
+          }
+        }
+      }
+    },
     "oauth-sign": {
       "version": "0.9.0",
       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
@@ -14288,6 +15124,26 @@
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       "dev": true
     },
+    "package-hash": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/package-hash/-/package-hash-4.0.0.tgz",
+      "integrity": "sha512-whdkPIooSu/bASggZ96BWVvZTRMOFxnyUG5PnTSGKoJE2gd5mbVNmR2Nj20QFzxYYgAXpoqC+AiXzl+UMRh7zQ==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.15",
+        "hasha": "^5.0.0",
+        "lodash.flattendeep": "^4.4.0",
+        "release-zalgo": "^1.0.0"
+      },
+      "dependencies": {
+        "graceful-fs": {
+          "version": "4.2.3",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.3.tgz",
+          "integrity": "sha512-a30VEBm4PEdx1dRB7MFK7BejejvCvBronbLjht+sHuGYj8PHs7M/5Z+rt5lw551vZ7yfTCj4Vuyy3mSJytDWRQ==",
+          "dev": true
+        }
+      }
+    },
     "pacote": {
       "version": "9.5.5",
       "resolved": "https://registry.npmjs.org/pacote/-/pacote-9.5.5.tgz",
@@ -14912,6 +15768,15 @@
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     },
+    "process-on-spawn": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/process-on-spawn/-/process-on-spawn-1.0.0.tgz",
+      "integrity": "sha512-1WsPDsUSMmZH5LeMLegqkPDrsGgsWwk1Exipy2hvB0o/F0ASzbpIctSCcZIK1ykJvtTJULEH+20WOFjMvGnCTg==",
+      "dev": true,
+      "requires": {
+        "fromentries": "^1.2.0"
+      }
+    },
     "promise": {
       "version": "7.3.1",
       "resolved": "https://registry.npmjs.org/promise/-/promise-7.3.1.tgz",
@@ -15574,6 +16439,15 @@
         }
       }
     },
+    "release-zalgo": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/release-zalgo/-/release-zalgo-1.0.0.tgz",
+      "integrity": "sha1-CXALflB0Mpc5Mw5TXFqQ+2eFFzA=",
+      "dev": true,
+      "requires": {
+        "es6-error": "^4.0.1"
+      }
+    },
     "remap-istanbul": {
       "version": "0.13.0",
       "resolved": "https://registry.npmjs.org/remap-istanbul/-/remap-istanbul-0.13.0.tgz",
@@ -16733,6 +17607,31 @@
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       "dev": true
     },
+    "spawn-wrap": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-2.0.0.tgz",
+      "integrity": "sha512-EeajNjfN9zMnULLwhZZQU3GWBoFNkbngTUPfaawT4RkMiviTxcX0qfhVbGey39mfctfDHkWtuecgQ8NJcyQWHg==",
+      "dev": true,
+      "requires": {
+        "foreground-child": "^2.0.0",
+        "is-windows": "^1.0.2",
+        "make-dir": "^3.0.0",
+        "rimraf": "^3.0.0",
+        "signal-exit": "^3.0.2",
+        "which": "^2.0.1"
+      },
+      "dependencies": {
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "spdx-correct": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.0.2.tgz",
@@ -17415,6 +18314,33 @@
         }
       }
     },
+    "test-exclude": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
+      "integrity": "sha512-cAGWPIyOHU6zlmg88jwm7VRyXnMN7iV68OGAbYDk/Mh/xC/pzVPlQtY6ngoIH/5/tciuhGfvESU8GrHrcxD56w==",
+      "dev": true,
+      "requires": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^7.1.4",
+        "minimatch": "^3.0.4"
+      },
+      "dependencies": {
+        "glob": {
+          "version": "7.1.6",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
+          "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
+          }
+        }
+      }
+    },
     "thenify": {
       "version": "3.3.0",
       "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.0.tgz",
@@ -17764,6 +18690,12 @@
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       "dev": true
     },
+    "type-fest": {
+      "version": "0.8.1",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
+      "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
+      "dev": true
+    },
     "type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
@@ -17802,6 +18734,15 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
       "dev": true
     },
+    "typedarray-to-buffer": {
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
+      "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
+      "dev": true,
+      "requires": {
+        "is-typedarray": "^1.0.0"
+      }
+    },
     "typeorm": {
       "version": "0.2.21",
       "resolved": "https://registry.npmjs.org/typeorm/-/typeorm-0.2.21.tgz",
@@ -20296,6 +21237,18 @@
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       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
+    "write-file-atomic": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.1.tgz",
+      "integrity": "sha512-JPStrIyyVJ6oCSz/691fAjFtefZ6q+fP6tm+OS4Qw6o+TGQxNp1ziY2PgS+X/m0V8OWhZiO/m4xSj+Pr4RrZvw==",
+      "dev": true,
+      "requires": {
+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
+      }
+    },
     "ws": {
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diff --git a/package.json b/package.json
index ef9ed0a3..77daf38f 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,8 @@
     "create-release": "gulp create-release",
     "build-backend": "tsc",
     "pretest": "tsc",
-    "test": "ng test && mocha --recursive test/backend/unit && mocha --recursive test/backend/integration  && mocha --recursive test/common/unit ",
+    "test": "ng test  && nyc mocha --recursive test",
+    "coverage": "nyc report --reporter=text-lcov | coveralls",
     "start": "node ./src/backend/index",
     "run-dev": "ng build --aot --watch --output-path=./dist --i18n-locale en --i18n-file src/frontend/translate/messages.en.xlf --i18n-missing-translation warning",
     "build-stats": "ng build --aot --prod --stats-json --output-path=./dist --i18n-locale en --i18n-file src/frontend/translate/messages.en.xlf --i18n-missing-translation warning",
@@ -92,6 +93,7 @@
     "chai-http": "4.3.0",
     "codelyzer": "5.2.0",
     "core-js": "3.4.7",
+    "coveralls": "3.0.9",
     "ejs-loader": "0.3.5",
     "gulp": "4.0.2",
     "gulp-json-editor": "2.5.4",
@@ -116,6 +118,7 @@
     "ngx-bootstrap": "5.2.0",
     "ngx-clipboard": "12.3.0",
     "ngx-toastr": "11.2.1",
+    "nyc": "15.0.0",
     "open-iconic": "1.1.1",
     "protractor": "5.4.2",
     "remap-istanbul": "0.13.0",