Bump autocfg from 1.2.0 to 1.3.0 in /src/_bcrypt (pyca#790)

Bumps [autocfg](https://github.com/cuviper/autocfg) from 1.2.0 to 1.3.0.
- [Commits](cuviper/autocfg@1.2.0...1.3.0)

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

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

Author: dependabot[bot]