chore(deps): update dependency karma-coverage to v2 (#776)

Author: renovate-bot

package.json

@@ -52,7 +52,7 @@
     "js-green-licenses": "^1.0.0",
     "karma": "^4.0.0",
     "karma-chrome-launcher": "^3.0.0",
-    "karma-coverage": "^1.1.2",
+    "karma-coverage": "^2.0.0",
     "karma-firefox-launcher": "^1.1.0",
     "karma-mocha": "^1.3.0",
     "karma-remap-coverage": "^0.1.5",