chore(deps-dev): update @types/react requirement from ^15.5.0 to ^16.8.4

Updates the requirements on [@types/react](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react)

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

package.json

@@ -72,7 +72,7 @@
     "@types/enzyme": "^2.8.6",
     "@types/enzyme-to-json": "^1.5.0",
     "@types/jest": "^20.0.7",
-    "@types/react": "^15.5.0",
+    "@types/react": "^16.8.4",
     "@types/react-dom": "^15.5.0",
     "@types/react-native": "^0.46.9",
     "@types/react-sticky": "^6.0.0",