[TASK] Update phpstan/phpstan requirement from ^1.12.5 to ^1.12.6

[dependabot]

Updates the requirements on phpstan/phpstan to permit the latest version.

Release notes

Sourced from phpstan/phpstan's releases.

1.12.6

Bleeding edge 🔪

• Added absent type checks about @phpstan-assert PHPDoc tags (phpstan/phpstan-src@ca0a7e9), #11780

If you want to see the shape of things to come and adopt bleeding edge features early, you can include this config file in your project's phpstan.neon:

includes:
	- vendor/phpstan/phpstan/conf/bleedingEdge.neon

Of course, there are no backwards compatibility guarantees when you include this file. The behaviour and reported errors can change in minor versions with this file included. Learn more

Improvements 🔧

• Update nikic/php-parser to v4.19.4 (phpstan/phpstan-src@0b9ce98)
• Process ClassConstFetch::$class when it's a Name node (phpstan/phpstan-src@712c33e)
• Process ClassConstFetch::$name (phpstan/phpstan-src@b38c852)
• Fix unused private property is not sometimes detected (#3539), #11802, thanks @​staabm!

Bugfixes 🐛

• Fixes for lowercase-string
  • Keep lowercase when trim (#3491), thanks @​VincentLanglet!
  • Add support for str_repeat and str_pad for lowercase string (#3490), thanks @​VincentLanglet!
  • Update ReplaceFunctionsDynamicReturnTypeExtension for lowercase-string (#3489), thanks @​VincentLanglet!
  • Update parse_str for lowercase string (#3492), thanks @​VincentLanglet!
  • More precise IntegerRangeType::toString() (#3475), thanks @​staabm!
  • Add support for lowercase-string on parse_url() (#3493), thanks @​VincentLanglet!
  • Improve Vsprintf inference (#3496, #3501), thanks @​VincentLanglet!
  • Offset access on lowercase-string is lowercase-string (#3502), thanks @​staabm!
  • IntegerType::toString() is lowercase (#3510), thanks @​VincentLanglet!
  • Handle lowercase string in sprintf (#3498), thanks @​VincentLanglet!
• Update composer/pcre (phpstan/phpstan-src@3cdac94), #11786
• Fix a few regex class parsing usecases (#3488), thanks @​mvorisek!
• Fix preg_match_all with PREG_SET_ORDER does not see capture group as optional (#3506), #11661, thanks @​staabm!
• Fix false-positive with preg_match(): Strict comparison using === between '' and non-falsy-string…ween '' and non-falsy-string (#3509), #11744, thanks @​staabm!

Function signature fixes 🤖

• functionMap: a bit more precise get_defined_constants (#3537), thanks @​janedbal!
• token_name() returns non-empty-string (#3540), thanks @​staabm!

... (truncated)

Commits

• dc4d2f1 PHPStan 1.12.6
• eb6a95a Updated PHPStan to commit eb6a95a9230d9c40e738c92edfef4f89e56678d2
• 7125e1b Updated PHPStan to commit 7125e1ba3d3c474ea8895f57da5865ea42bd8360
• 133c60e Updated PHPStan to commit 133c60e766fd8874254e1889c01cc474f8558d4d
• 83ba597 Updated PHPStan to commit 83ba5972466d0b9bdfa4592996ccf381de625b1f
• 3078f1a Updated PHPStan to commit 3078f1a175d2245aab64f77c8bc5f9fe9cc884f5
• c6db9a9 Updated PHPStan to commit c6db9a920c35493e09458236f18a267a7548fec3
• e2654b7 Updated PHPStan to commit e2654b7dc87951e1481bc46d8f1f7ff587e3f484
• 58b3397 Updated PHPStan to commit 58b33972621d3faf25ac6c7b82b8a6703349b496
• ca0a7e9 Updated PHPStan to commit ca0a7e9955397eef453b38c94ac67ba6faf7356b
• Additional commits viewable in compare view

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