chore(deps-dev): bump @types/react from 16.8.20 to 16.8.21 (#65)

Bumps [@types/react](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react) from 16.8.20 to 16.8.21.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -42,7 +42,7 @@
   "devDependencies": {
     "@types/blueimp-md5": "^2.7.0",
     "@types/fs-extra": "^7.0.0",
-    "@types/react": "^16.8.20",
+    "@types/react": "^16.8.21",
     "@types/react-dom": "^16.8.4",
     "@types/react-lazyload": "^2.5.0",
     "@types/react-router-dom": "^4.3.4",