Update pestphp/pest requirement from ^2.21 to ^3.7

Updates the requirements on [pestphp/pest](https://github.com/pestphp/pest) to permit the latest version.
- [Release notes](https://github.com/pestphp/pest/releases)
- [Changelog](https://github.com/pestphp/pest/blob/3.x/RELEASE.md)
- [Commits](pestphp/pest@v2.21.0...v3.7.0)

---
updated-dependencies:
- dependency-name: pestphp/pest
  dependency-type: direct:development
...

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

composer.json

@@ -20,7 +20,7 @@
     },
     "require-dev": {
         "laravel/pint": "^1.13",
-        "pestphp/pest": "^2.21",
+        "pestphp/pest": "^3.7",
         "spatie/pest-plugin-snapshots": "^2.1"
     },
     "minimum-stability": "dev",