Merge pull request #5743 from plotly/karma-6.3.4

bump karma v6.3.4

Author: archmoj

package-lock.json

@@ -155,7 +155,7 @@
     "into-stream": "^6.0.0",
     "jasmine-core": "^3.5.0",
     "jsdom": "^16.6.0",
-    "karma": "^6.3.2",
+    "karma": "^6.3.4",
     "karma-browserify": "^8.0.0",
     "karma-chrome-launcher": "^3.1.0",
     "karma-firefox-launcher": "^2.1.1",