chore(deps): update dependency karma to v6 [security]

Author: renovate[bot]

package.json

@@ -101,7 +101,7 @@
     "husky": "0.13.3",
     "jasmine-core": "2.6.4",
     "jasmine-spec-reporter": "4.1.1",
-    "karma": "1.7.1",
+    "karma": "6.3.16",
     "karma-chrome-launcher": "2.1.1",
     "karma-cli": "1.0.1",
     "karma-coverage-istanbul-reporter": "1.3.0",