revert karma bump

Author: MaxAake

packages/neo4j-driver/package-lock.json

@@ -61,9 +61,9 @@
     "gulp-uglify": "^3.0.2",
     "gulp-watch": "^5.0.1",
     "jasmine-spec-reporter": "^7.0.0",
-    "karma": "^6.4.4",
+    "karma": "^6.4.2",
     "karma-chrome-launcher": "^3.2.0",
-    "karma-firefox-launcher": "^2.1.3",
+    "karma-firefox-launcher": "^2.1.2",
     "karma-jasmine": "^5.1.0",
     "karma-source-map-support": "^1.4.0",
     "karma-spec-reporter": "^0.0.36",