Update dependency phpstan/phpstan to v1.12.12

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.12.11 -> 1.12.12

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Release Notes

phpstan/phpstan (phpstan/phpstan)

v1.12.12

Compare Source

Improvements 🔧

• Introduce uppercase-string PHPDoc type (#​3613), thanks @​pmjones!

Bugfixes 🐛

• Fix sprintf dynamic return type (#​3640), #​12065, thanks @​VincentLanglet!
• Patch wrong namespace prefixing in PHAR in WindowsRegistryLogicalFinder (https://github.com/phpstan/phpstan-src/commit/f61d3247db160c875a2e1893aaee519963830f99), #​12076
• Fix static return type in php-8-stubs (https://github.com/phpstan/phpstan-src/commit/162f774858b461b9cc89f0c604c798381053dc32), #​12077
• Retain list type when assigning to offset 1 of non-empty-list (#​3682), #​12131, thanks @​herndlm!

Function signature fixes 🤖

• Closure::bind and bindTo return benevolent union with null (https://github.com/phpstan/phpstan-src/commit/b049d8d7d7e25df00c80b1ec585beb2dd2896123)
• Remove sha256 function definition (#​3664), thanks @​VincentLanglet!

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