chore(package): update karma-coverage-istanbul-reporter to version 2.0.3

Closes #19

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
     "jasmine-spec-reporter": "~4.2.1",
     "karma": "~2.0.0",
     "karma-chrome-launcher": "~2.2.0",
-    "karma-coverage-istanbul-reporter": "^1.2.1",
+    "karma-coverage-istanbul-reporter": "^2.0.3",
     "karma-jasmine": "~1.1.0",
     "karma-jasmine-html-reporter": "^0.2.2",
     "protractor": "~5.3.0",