Bump macfsevents from 0.8.1 to 0.8.4

Bumps [macfsevents](https://github.com/malthe/macfsevents) from 0.8.1 to 0.8.4.
- [Changelog](https://github.com/malthe/macfsevents/blob/master/CHANGES.rst)
- [Commits](malthe/macfsevents@0.8.1...0.8.4)

---
updated-dependencies:
- dependency-name: macfsevents
  dependency-version: 0.8.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]