Bump MimeKit from 2.10.1 to 2.13.0
Bump MimeKit from 2.10.1 to 2.13.0

Bumps [MimeKit](https://github.com/jstedfast/MimeKit) from 2.10.1 to 2.13.0.
- [Release notes](https://github.com/jstedfast/MimeKit/releases)
- [Changelog](https://github.com/jstedfast/MimeKit/blob/master/ReleaseNotes.md)
- [Commits](https://github.com/jstedfast/MimeKit/compare/2.10.1...2.13.0)

---
updated-dependencies:
- dependency-name: MimeKit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
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