chore: release v0.2.1 (#21)

## 🤖 New release
* `migrator`: 0.2.0 -> 0.2.1 (✓ API compatible changes)

<details><summary><i><b>Changelog</b></i></summary><p>


</p></details>

---
This PR was generated with
[release-plz](https://github.com/MarcoIeni/release-plz/).

Co-authored-by: the-hacker-app-releases[bot] <150499272+the-hacker-app-releases[bot]@users.noreply.github.com>

Author: the-hacker-app-releases[bot]

Cargo.lock

@@ -1,7 +1,7 @@
 [package]
 name = "migrator"
 description = "A simple library for managing database migrations"
-version = "0.2.0"
+version = "0.2.1"
 license = "MIT"
 homepage = "https://github.com/TheHackerApp/migrator"
 repository = "https://github.com/TheHackerApp/migrator.git"