Update dependency orchestra/testbench to v6 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
orchestra/testbench (source)	require-dev	major	^4.0 || ^5.0 -> ^6.0

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Release Notes

orchestral/testbench

v6.0.0

Compare Source

Added

• Added Orchestra\Testbench\Factories\UserFactory to handle Illuminate\Foundation\Auth\User model.
• Automatically autoloads Illuminate\Database\Eloquent\LegacyFactoryServiceProvider if the service provider exists.

Changes

• Update support for Laravel Framework v8.
• Increase minimum PHP version to 7.3 and above (tested with 7.3 and 7.4).
• Configuration changes:
  • Changed auth.providers.users.model to Illuminate\Foundation\Auth\User.
  • Changed queue.failed.driver to database-uuid.

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