Bump eslint-plugin-jsx-a11y from 6.2.3 to 6.3.1

Bumps [eslint-plugin-jsx-a11y](https://github.com/evcohen/eslint-plugin-jsx-a11y) from 6.2.3 to 6.3.1.
- [Release notes](https://github.com/evcohen/eslint-plugin-jsx-a11y/releases)
- [Changelog](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/blob/master/CHANGELOG.md)
- [Commits](infofarmer/eslint-plugin-jsx-a11y@v6.2.3...v6.3.1)

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