Bump scopeguard from 1.1.0 to 1.2.0 in /src/_bcrypt

Bumps [scopeguard](https://github.com/bluss/scopeguard) from 1.1.0 to 1.2.0.
- [Commits](bluss/scopeguard@v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: scopeguard
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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