chore(package): update karma-mocha to version 2.0.1

Closes #51

Author: greenkeeper[bot]

package.json

@@ -50,7 +50,7 @@
     "karma": "^2.0.5",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",
-    "karma-mocha": "^1.3.0",
+    "karma-mocha": "^2.0.1",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^3.0.0",
     "mocha": "^5.0.0",