Bump syn from 1.0.94 to 1.0.95 in /src/_bcrypt (#337)

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.94 to 1.0.95.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.94...1.0.95

)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: indirect
  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>