chore(deps): update dependency phpstan/phpstan to v1.9.4

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.9.3 -> 1.9.4

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Release Notes

phpstan/phpstan

v1.9.4

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Improvements 🔧

• Various performance optimizations from @​staabm (#​2098, #​2099, #​2100, #​2101, #​2103, #​2104)
• Resolve parameter types only when checkArgumentTypes=true (#​2106), thanks @​staabm!
• Keep NeverType isExplicit flag in TypeCombinator::intersect() (#​2112), thanks @​staabm!
• Keep NeverType isExplicit flag in InitializerExprTypeResolver (#​2114), thanks @​staabm!
• Add TypeCombinator::removeFalsey() (#​2003), thanks @​axlon!
• Option usePathConstantsAsConstantString (#​2050), thanks @​MartinMystikJonas!

Bugfixes 🐛

• Fix native type on unset (#​2107), #​7805, thanks @​rajyan!
• Fix return type of array_search() with constant array type haystack (#​1806), #​3789, thanks @​takaram!
• parse_str() might return nested arrays by-ref (#​1994), #​8356, thanks @​staabm!
• Fix regression in for loop (https://github.com/phpstan/phpstan-src/commit/a8975b1800d6c5cb88a6af02e132b4e44e093fc3), #​8520
• Fix readonly properties bugs and infinite recursion (https://github.com/phpstan/phpstan-src/commit/a7fed03bbf1bef545c8afcbf6c906ac93b34c876), #​8543
• Fix internal error for dynamic properties defined on interface on PHP 8.2 (https://github.com/phpstan/phpstan-src/commit/4025209062e31619077197006ce44b5d60a9f2c1), #​8537

Internals 🔍

• Implement getConstantStrings() on Type (#​1979), thanks @​staabm!
• Fix node PHPDoc type hints (#​2053), thanks @​herndlm!
• Refactor FilterVarDynamicReturnTypeExtension to pass around Types instead of Args and the Scope (#​2109), thanks @​herndlm!

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