message: changed from 2.x to 1.0 to be compatible with material-ui-pickers
diff: "@backstage/errors": "^0.1.3",
  "@backstage/plugin-catalog-react": "^0.6.1",
  "@backstage/theme": "^0.2.12",
  - "@date-io/luxon": "2.x",
  + "@date-io/luxon": "1.x",
  "@material-ui/core": "^4.12.2",
  "@material-ui/icons": "^4.9.1",
  "@material-ui/lab": "4.0.0-alpha.57",
  