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

Author: renovate[bot]

package.json

@@ -35,7 +35,7 @@
     "eslint-plugin-jsx-a11y": "^3.0.2",
     "eslint-plugin-react": "^6.9.0",
     "http-server": "^0.10.0",
-    "karma": "^1.4.1",
+    "karma": "^6.3.16",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-coverage": "^1.1.1",