message: fix(fossa): Bump core packages version to fix failing CI
diff: },
  "dependencies": {
  "@backstage/catalog-model": "^0.6.0",
  - "@backstage/core": "^0.4.1",
  + "@backstage/core": "^0.4.2",
  "@backstage/theme": "^0.2.2",
  "@material-ui/core": "^4.11.0",
  "@material-ui/icons": "^4.9.1",
  "react-use": "^15.3.3"
  },
  "devDependencies": {
  - "@backstage/cli": "^0.4.2",
  + "@backstage/cli": "^0.4.3",
  "@backstage/dev-utils": "^0.1.6",
  - "@backstage/test-utils": "^0.1.5",
  + "@backstage/test-utils": "^0.1.6",
  "@testing-library/jest-dom": "^5.10.1",
  "@testing-library/react": "^10.4.1",
  "@testing-library/user-event": "^12.0.7",
  