chore(package): update karma-coverage-istanbul-reporter to version 2.1.0

Closes #235

Author: greenkeeper[bot]

package.json

@@ -184,7 +184,7 @@
     "jasmine-spec-reporter": "4.2.1",
     "karma": "4.1.0",
     "karma-chrome-launcher": "2.2.0",
-    "karma-coverage-istanbul-reporter": "2.0.5",
+    "karma-coverage-istanbul-reporter": "2.1.0",
     "karma-jasmine": "2.0.1",
     "karma-jasmine-html-reporter": "1.4.2",
     "lite-server": "2.4.0",