chore(deps): update cron requirement from 0.12 to 0.13

Updates the requirements on [cron](https://github.com/zslayton/cron) to permit the latest version.
- [Release notes](https://github.com/zslayton/cron/releases)
- [Commits](zslayton/cron@v0.12.0...v0.13.0)

---
updated-dependencies:
- dependency-name: cron
  dependency-type: direct:production
...

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

Cargo.toml

@@ -22,7 +22,7 @@ all = ["async", "sync"]
 
 [dependencies]
 chrono = "0.4"
-cron = "0.12"
+cron = "0.13"
 thiserror = "1.0"
 crossbeam-channel = "0.5"
 tokio = { version = "1.25", optional = true, features = ["sync", "rt-multi-thread", "time", "macros"] }