Class constants declaring class fix for PHPStan 2.1.38+, better tests

[spaze]

Constants

• Don't include template types in constant's declaring class display name, needed for PHPStan 2.1.38+ (Don't include template types in constant's declaring class display name #363)
• Update the docs for constant usage in params (Update the docs for constant usage in params  #364)

Tests

• Run e2e tests on PHP 8.5 (Run some e2e tests on PHP 8.5 #356, Run all E2E tests on PHP 8.5 #359)
• Analyze bin (Analyze bin #358)

Dependency updates

• Bump actions/checkout from 5 to 6 (Bump actions/checkout from 5 to 6 #357)
• Upgrade shipmonk/dead-code-detector (Upgrade shipmonk/dead-code-detector #362)

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This discussion was created from the release Class constants declaring class fix for PHPStan 2.1.38+, better tests.