Bump charlock_holmes from 0.7.6 to 0.7.7

Bumps [charlock_holmes](https://github.com/brianmario/charlock_holmes) from 0.7.6 to 0.7.7.
- [Release notes](https://github.com/brianmario/charlock_holmes/releases)
- [Commits](https://github.com/brianmario/charlock_holmes/compare/0.7.6...v0.7.7

)

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