Bump thiserror from 1.0.48 to 1.0.50 in /native/html5ever_nif (#119)

Bumps [thiserror](https://github.com/dtolnay/thiserror) from 1.0.48 to 1.0.50.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@1.0.48...1.0.50)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>