Update phpstan/phpstan requirement from ^1.9.2 to ^1.9.4

[dependabot[bot]]

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

Release notes

Sourced from phpstan/phpstan's releases.

1.9.4

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!

Commits

• d03bcce PHPStan 1.9.4
• b22aa05 Updated PHPStan to commit 4025209062e31619077197006ce44b5d60a9f2c1
• 811db85 Updated PHPStan to commit a7fed03bbf1bef545c8afcbf6c906ac93b34c876
• 274d06e Infinite recursion regression test
• ad9d3c7 Updated PHPStan to commit a8975b1800d6c5cb88a6af02e132b4e44e093fc3
• 7a65fac Updated PHPStan to commit 2a61ebc7d07888dbb2836147edaa21b78a983065
• c0086d9 output-format: add info about editorUrlTitle
• 15377d9 Updated PHPStan to commit 901d789a45f0682bf6adbdfde516ec1011d873bb
• 9a25ace Updated PHPStan to commit bc4b2fe0d83a0e601448dbdaa8b0a288342c23f3
• 89c729c Updated PHPStan to commit 03786827d92df439c3a31760bcd98d560035a33f
• Additional commits viewable in compare view

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