Bump eslint-plugin-jsx-a11y from 6.1.2 to 6.2.1 (#10923)

Bumps [eslint-plugin-jsx-a11y](https://github.com/evcohen/eslint-plugin-jsx-a11y) from 6.1.2 to 6.2.1.
- [Release notes](https://github.com/evcohen/eslint-plugin-jsx-a11y/releases)
- [Changelog](https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/CHANGELOG.md)
- [Commits](https://github.com/evcohen/eslint-plugin-jsx-a11y/compare/v6.1.2...v6.2.1)

package.json

@@ -170,7 +170,7 @@
     "enzyme-adapter-react-16": "^1.7.1",
     "eslint": "^5.11.1",
     "eslint-plugin-import": "~2.14.0",
-    "eslint-plugin-jsx-a11y": "~6.1.2",
+    "eslint-plugin-jsx-a11y": "~6.2.1",
     "eslint-plugin-promise": "~4.1.1",
     "eslint-plugin-react": "~7.12.1",
     "jest": "^24.8.0",