chore(phpstan): update phpstan version and clear phpstan baseline

Updated the version of phpstan in .phive/phars.xml to 1.* and installed 1.12.13. Removed the specific lines of ignored errors in phpstan-baseline.neon to keep it clean and avoid masking significant errors. Now, phpstan will provide better and more specific coding style issues and potential bugs.

mentioned in commit 0911f050

merged

This MR is included in version 2.1.2

The release is available on GitLab release.

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