Update dependency laravel/pint to v1.13.7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
laravel/pint (source)	1.13.6 -> 1.13.7

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Release Notes

laravel/pint (laravel/pint)

### [`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 [@​otsch](https://togithub.com/otsch) in [https://github.com/laravel/pint/pull/236](https://togithub.com/laravel/pint/pull/236)

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