chore(deps): update dependency karma to v6.4.2

Author: renovate[bot]

package-lock.json

@@ -36,7 +36,7 @@
     "codelyzer": "6.0.2",
     "jasmine-core": "3.99.1",
     "jasmine-spec-reporter": "5.0.2",
-    "karma": "6.3.16",
+    "karma": "6.4.2",
     "karma-chrome-launcher": "3.1.1",
     "karma-coverage-istanbul-reporter": "3.0.3",
     "karma-jasmine": "4.0.2",