Bump chartkick from 3.4.2 to 4.0.0
Bump chartkick from 3.4.2 to 4.0.0

Bumps [chartkick](https://github.com/ankane/chartkick) from 3.4.2 to 4.0.0.
- [Release notes](https://github.com/ankane/chartkick/releases)
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/chartkick/compare/v3.4.2...v4.0.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
biow0lf/evemonk,biow0lf/evemonk,biow0lf/evemonk