Update composer.json

[jamipietila]

Summary

This pull request updates the symfony/finder dependency to support versions ^6.3.0 and higher. This change resolves conflicts with other packages that require newer versions of symfony/finder.

Changes

• Updated composer.json to allow symfony/finder versions ^6.3.0.

Justification

Updating the symfony/finder dependency is necessary to resolve conflicts with other widely-used packages such as pestphp/pest-plugin-drift and ta-tikoma/phpunit-architecture-test. These packages require symfony/finder versions ^6.3.0 and higher, which currently conflict with the existing dependency requirements.

Testing

• Verified that the package works correctly with symfony/finder version 6.4.

Impact

This change should be backward compatible with projects using symfony/finder versions ^5.4 as well, given the non-breaking nature of the updates in symfony/finder 6.x.

Please let me know if there are any concerns or if further changes are required. Thank you for considering this update.