build(deps): bump cbc from 0.2.0 to 0.2.1

Bumps [cbc](https://github.com/RustCrypto/block-modes) from 0.2.0 to 0.2.1.
- [Commits](RustCrypto/block-modes@cbc-v0.2.0...cbc-v0.2.1)

---
updated-dependencies:
- dependency-name: cbc
  dependency-version: 0.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]