⬆️ Bump kiwisolver from 1.1.0 to 1.2.0 (#78)

Bumps [kiwisolver](https://github.com/nucleic/kiwi) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/nucleic/kiwi/releases)
- [Changelog](https://github.com/nucleic/kiwi/blob/master/releasenotes.rst)
- [Commits](nucleic/kiwi@1.1.0...1.2.0)

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