test: update for CI 4.5.0

[kenjis]

Description

• update test code
• update phpstan-baseline.php

Checklist:

• [x] Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• [] User guide updated
• [x] Conforms to style guide

[kenjis]

Thank you for the review. At least, PHPStan errors will be gone.