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

Author: renovate[bot]

package.json

@@ -74,7 +74,7 @@
     "jasmine-spec-reporter": "5.0.2",
     "jest": "26.4.0",
     "jest-preset-angular": "8.2.1",
-    "karma": "5.2.3",
+    "karma": "6.3.16",
     "karma-chrome-launcher": "3.1.0",
     "karma-coverage-istanbul-reporter": "3.0.3",
     "karma-jasmine": "3.3.1",