chore(deps): update dependency karma to v6

Author: renovate-bot

package.json

@@ -36,7 +36,7 @@
     "codelyzer": "6.0.2",
     "jasmine-core": "3.10.1",
     "jasmine-spec-reporter": "5.0.2",
-    "karma": "5.2.3",
+    "karma": "6.3.6",
     "karma-chrome-launcher": "3.1.0",
     "karma-coverage-istanbul-reporter": "3.0.3",
     "karma-jasmine": "4.0.1",