Bump mailparse from 0.15.0 to 0.16.1

Bumps [mailparse](https://github.com/staktrace/mailparse) from 0.15.0 to 0.16.1.
- [Commits](staktrace/mailparse@v0.15.0...v0.16.1)

---
updated-dependencies:
- dependency-name: mailparse
  dependency-version: 0.16.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -135,7 +135,7 @@ zip = { version = "2", default-features = false, features = ["deflate"] }
 lettre = { version = "0.11", default-features = false, features = ["builder", "hostname", "smtp-transport", "tokio1", "tokio1-rustls-tls"] }
 imap = "2"
 native-tls = "0.2"
-mailparse = "0.15"
+mailparse = "0.16"
 
 # Testing
 tokio-test = "0.4"