chore(dev-deps): update dependency karma to v6.4.3

Author: renovate[bot]

package-lock.json

@@ -106,7 +106,7 @@
     "jest": "25.5.4",
     "jest-extended": "0.11.5",
     "jsuri": "1.3.1",
-    "karma": "6.4.2",
+    "karma": "6.4.3",
     "karma-browserstack-launcher": "1.6.0",
     "karma-chrome-launcher": "3.2.0",
     "karma-firefox-launcher": "2.1.2",