chore(deps): update dependency laravel/pint to v1.13.7 (#57)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [laravel/pint](https://laravel.com)
([source](https://togithub.com/laravel/pint)) | `1.13.6` -> `1.13.7` |
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|
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|
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---

### Release Notes

<details>
<summary>laravel/pint (laravel/pint)</summary>

###
[`v1.13.7`](https://togithub.com/laravel/pint/blob/HEAD/CHANGELOG.md#v1137---2023-12-05)

[Compare
Source](https://togithub.com/laravel/pint/compare/v1.13.6...v1.13.7)

- Change default for nullable_type_declaration_for_default_null_value by
[@&#8203;otsch](https://togithub.com/otsch) in
[https://github.com/laravel/pint/pull/236](https://togithub.com/laravel/pint/pull/236)

</details>

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composer.json

@@ -15,7 +15,7 @@
     },
     "require-dev": {
         "fakerphp/faker": "1.23.0",
-        "laravel/pint": "1.13.6",
+        "laravel/pint": "1.13.7",
         "laravel/sail": "1.26.3",
         "mockery/mockery": "1.6.7",
         "nunomaduro/collision": "7.10.0",