Fix #51

And reformat the package.json while I'm at it.

.nycrc.json

@@ -0,0 +1,3 @@
+{
+    "extends": "@istanbuljs/nyc-config-typescript"
+}

README.md

@@ -25,4 +25,6 @@ $> npm run clean
 ```shell script
 # Run tests
 $> npm test
+# Run tests with coverage
+$> npm run coverage
 ```

package.json

@@ -1,38 +1,41 @@
 {
-  "name": "fwdekker.com",
-  "version": "1.6.4",
-  "description": "The source code of [my personal website](https://fwdekker.com/).",
-  "author": "Felix W. Dekker",
-  "repository": {
-    "type": "git",
-    "url": "git@git.fwdekker.com:FWDekker/fwdekker.com.git"
-  },
-  "private": true,
-  "scripts": {
-    "clean": "grunt clean",
-    "dev": "grunt dev",
-    "deploy": "grunt deploy",
-    "test": "mocha -r ts-node/register src/**/*.spec.ts"
-  },
-  "dependencies": {
-    "js-cookie": "^2.2.1"
-  },
-  "devDependencies": {
-    "@types/chai": "^4.2.4",
-    "@types/js-cookie": "^2.2.4",
-    "@types/mocha": "^5.2.7",
-    "chai": "^4.2.0",
-    "grunt": "^1.0.4",
-    "grunt-cli": "^1.3.2",
-    "grunt-contrib-clean": "^2.0.0",
-    "grunt-contrib-copy": "^1.0.0",
-    "grunt-text-replace": "^0.4.0",
-    "grunt-webpack": "^3.1.3",
-    "mocha": "^6.2.2",
-    "ts-loader": "^6.2.1",
-    "ts-node": "^8.4.1",
-    "typescript": "^3.7.2",
-    "webpack": "^4.41.2",
-    "webpack-cli": "^3.3.10"
-  }
+    "name": "fwdekker.com",
+    "version": "1.6.4",
+    "description": "The source code of [my personal website](https://fwdekker.com/).",
+    "author": "Felix W. Dekker",
+    "repository": {
+        "type": "git",
+        "url": "git@git.fwdekker.com:FWDekker/fwdekker.com.git"
+    },
+    "private": true,
+    "scripts": {
+        "clean": "grunt clean",
+        "dev": "grunt dev",
+        "deploy": "grunt deploy",
+        "test": "mocha -r ts-node/register src/**/*.spec.ts",
+        "coverage": "nyc npm run test"
+    },
+    "dependencies": {
+        "js-cookie": "^2.2.1"
+    },
+    "devDependencies": {
+        "@istanbuljs/nyc-config-typescript": "^0.1.3",
+        "@types/chai": "^4.2.4",
+        "@types/js-cookie": "^2.2.4",
+        "@types/mocha": "^5.2.7",
+        "chai": "^4.2.0",
+        "grunt": "^1.0.4",
+        "grunt-cli": "^1.3.2",
+        "grunt-contrib-clean": "^2.0.0",
+        "grunt-contrib-copy": "^1.0.0",
+        "grunt-text-replace": "^0.4.0",
+        "grunt-webpack": "^3.1.3",
+        "mocha": "^6.2.2",
+        "nyc": "^14.1.1",
+        "ts-loader": "^6.2.1",
+        "ts-node": "^8.4.1",
+        "typescript": "^3.7.2",
+        "webpack": "^4.41.2",
+        "webpack-cli": "^3.3.10"
+    }
 }