v1.6.14

Bump github.com/slack-go/slack from 0.9.4 to 0.9.5 (#59)

Bumps [github.com/slack-go/slack](https://github.com/slack-go/slack) from 0.9.4 to 0.9.5.
- [Release notes](https://github.com/slack-go/slack/releases)
- [Changelog](https://github.com/slack-go/slack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/slack-go/slack/compare/v0.9.4...v0.9.5)

---
updated-dependencies:
- dependency-name: github.com/slack-go/slack
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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