Update dependency karma-babel-preprocessor to v8

Author: renovate-bot

package-lock.json

@@ -25,7 +25,7 @@
     "jasmine": "3.3.1",
     "jasmine-core": "3.3.0",
     "karma": "3.1.4",
-    "karma-babel-preprocessor": "7.0.0",
+    "karma-babel-preprocessor": "8.0.0",
     "karma-chrome-launcher": "2.2.0",
     "karma-coverage": "1.1.2",
     "karma-firefox-launcher": "1.1.0",