message: fix: pin jsdom to 12.0.0
diff: "grunt-karma": "~3.0.0",
  "grunt-run": "^0.8.0",
  "if-env": "^1.0.0",
  - "jsdom": "^12.0.0",
  + "jsdom": "12.0.0",
  "jsonfile": "^5.0.0",
  "karma": "~3.0.0",
  "karma-chai": "^0.1.0",
  