message: Correct backstage/core version
diff: "clean": "backstage-cli clean"
  },
  "dependencies": {
  - "@backstage/core": "^0.7.7",
  + "@backstage/core": "^0.7.6",
  "@backstage/theme": "^0.2.6",
  "@material-ui/core": "^4.11.0",
  "@material-ui/icons": "^4.9.1",
  