Bump unicode-bidi from 0.3.6 to 0.3.7

Bumps [unicode-bidi](https://github.com/servo/unicode-bidi) from 0.3.6 to 0.3.7.
- [Release notes](https://github.com/servo/unicode-bidi/releases)
- [Commits](servo/unicode-bidi@v0.3.6...v0.3.7)

---
updated-dependencies:
- dependency-name: unicode-bidi
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>