Update pestphp/pest requirement from ^2.21 to ^3.7

[dependabot[bot]]

Updates the requirements on pestphp/pest to permit the latest version.

Release notes

Sourced from pestphp/pest's releases.

v3.7.0

• Adds PHPUnit 11.5.0 support

Commits

• 9688b83 release: 3.7.0
• 675372c chore: fixes types
• c18636b chore: adds phpunit 11.5.0 support
• 145294a chore: style
• c2cabae chore: fixes test suite
• 918a8fc release: 3.6.0
• 5d32dd0 feat: option to coverage
• 982353f release: 3.5.2
• 2eefa8b chore: adds phpunit 11.4.4 support
• 787d549 chore: ignores temporary file
• Additional commits viewable in compare view

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