Bump eslint-plugin-react from 7.12.4 to 7.20.0

Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.12.4 to 7.20.0.
- [Release notes](https://github.com/yannickcr/eslint-plugin-react/releases)
- [Changelog](https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md)
- [Commits](jsx-eslint/eslint-plugin-react@v7.12.4...v7.20.0)

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

Author: dependabot-preview[bot]

package.json

@@ -53,7 +53,7 @@
     "enzyme-adapter-react-16": "1.11.2",
     "enzyme-to-json": "3.3.5",
     "eslint": "5.16.0",
-    "eslint-plugin-react": "7.12.4",
+    "eslint-plugin-react": "7.20.0",
     "file-loader": "6.0.0",
     "gh-pages": "2.0.1",
     "html-loader": "1.1.0",