message: Add back to pass diff check
diff: "@backstage/theme": "^0.2.5",
  "@material-ui/core": "^4.11.0",
  "@material-ui/icons": "^4.9.1",
  + "@material-ui/lab": "4.0.0-alpha.45",
  "@types/zen-observable": "^0.8.2",
  "react": "^16.13.1",
  "react-dom": "^16.13.1",
  