message: add react types to dev dependencies
diff: "@testing-library/jest-dom": "^5.10.1",
  "@testing-library/react": "^11.2.5",
  "@testing-library/user-event": "^13.1.8",
  + "@types/react": "^16.9",
  "@types/jest": "^26.0.7",
  "@types/node": "^14.14.32",
  "cross-fetch": "^3.0.6",
  