chore(deps-dev): update eslint requirement from ^4.13.1 to ^5.9.0
chore(deps-dev): update eslint requirement from ^4.13.1 to ^5.9.0

Updates the requirements on [eslint](https://github.com/eslint/eslint) to permit the latest version.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/commits/v5.9.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
kywk/hexi,hexojs/hexo,ppker/hexo,DevinLow/DevinLow.github.io,hexojs/hexo,DevinLow/DevinLow.github.io,kywk/hexi,ppker/hexo