Update dependency karma to v5.0.4

Author: renovate-bot

package-lock.json

@@ -25,7 +25,7 @@
     "http-server": "0.12.1",
     "husky": "4.2.5",
     "istanbul-instrumenter-loader": "3.0.1",
-    "karma": "5.0.2",
+    "karma": "5.0.4",
     "karma-chrome-launcher": "3.1.0",
     "karma-cli": "2.0.0",
     "karma-coverage": "2.0.2",