Bump eslint from 7.5.0 to 7.6.0 in /token/js (solana-labs#199)

Bumps [eslint](https://github.com/eslint/eslint) from 7.5.0 to 7.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v7.5.0...v7.6.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>