Bump eslint-plugin-react from 7.20.0 to 7.20.3 in /token/js (#100)

Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.20.0 to 7.20.3.
- [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@v7.20.0...v7.20.3)

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