message: Downgrade to Karma 1.x for compatibility with Stryker
diff: "jasmine": "~2",
  "jasmine-reporters": "~2.3",
  "jest": "~22",
  - "karma": "~2",
  + "karma": "~1",
  "karma-chrome-launcher": "~2.2",
  "karma-cli": "~1.0",
  "karma-coverage": "~1.1",
  