Bump proc-macro2 from 1.0.93 to 1.0.94 in /src/_bcrypt (#997)

Bumps [proc-macro2](https://github.com/dtolnay/proc-macro2) from 1.0.93 to 1.0.94.
- [Release notes](https://github.com/dtolnay/proc-macro2/releases)
- [Commits](dtolnay/proc-macro2@1.0.93...1.0.94)

---
updated-dependencies:
- dependency-name: proc-macro2
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]