Update phpstan/phpstan requirement from ^0.12.88 to ^1.4.1

[dependabot[bot]]

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

Release notes

Sourced from phpstan/phpstan's releases.

1.4.1

Improvements 🔧

• TypeSpecifier - understand == operator for the same types on both sides (https://github.com/phpstan/phpstan-src/commit/e40eff0a8e34ceae776e38d48a31efbe67ea399a), #6370, #4413
• Add ClassReflection::getBackedEnumType() method (https://github.com/phpstan/phpstan-src/commit/a0ed2d304e0344df34b49e010d5f491f0d321d3a)
• Achieve BenevolentUnionType return type without dynamic return type extension (https://github.com/phpstan/phpstan-src/commit/723dfc51eab190ff940d0b0130b9986eb1b5d36a), https://github.com/phpstan/phpstan/discussions/6391

Bugfixes 🐛

• Allow readonly property write in __unserialize (#929), thanks @​ruudk!
• Fix missing properties on UnitEnum and BackedEnum (https://github.com/phpstan/phpstan-src/commit/67d3a882a85e53f36158e60a8cb30e997aca293c), #6385
• ConstantArrayTypeBuilder - fix for potential performance problems (https://github.com/phpstan/phpstan-src/commit/86b93068ae863a0377118dfe93c3b1286a8673b7), #6375

Function signature fixes 🤖

• Add missing Set::map() method to functionMap (#923), thanks @​simPod!
• gnupg_verify() accepts false fot its signature param (#925), thanks @​spaze!
• Improve signature of random_bytes() (#926), thanks @​staabm!
• More precise count_chars() mode-param (#927), thanks @​staabm!
• More precise getdate() return type (#928), thanks @​staabm!

Commits

• 5bd02c8 PHPStan 1.4.1
• ab79d61 Updated PHPStan to commit 723dfc51eab190ff940d0b0130b9986eb1b5d36a
• 3f03559 Updated PHPStan to commit f7197a88ee5e7cdcb9fc7f94949677cb2f579440
• 7131357 Updated PHPStan to commit f6e728683d16c102a453322a7c245dccde10b693
• 81332f0 Updated PHPStan to commit 86b93068ae863a0377118dfe93c3b1286a8673b7
• 0c28ad6 Updated PHPStan to commit 67d3a882a85e53f36158e60a8cb30e997aca293c
• 93d4221 Update update-playground-runner.yml
• a2d346d Updated PHPStan to commit a712907ceecb8389eb3a73ce315475574b54e743
• b7f697a Update playground-runner to PHP 8.1
• c070c4b Updated PHPStan to commit b81066d7acd6ab5c003c406c187d4f06283a618c
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #61.