chore(deps): update dependency phpstan/phpstan to v1.8.1

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.8.0 -> 1.8.1

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Release Notes

phpstan/phpstan

v1.8.1

Compare Source

Improvements 🔧

• ReadWritePropertiesExtensions are part of ClassPropertiesNode (https://github.com/phpstan/phpstan-src/commit/49c27d8849b1d153a67f28e612e490a71b4fd477), https://github.com/phpstan/phpstan-src/pull/1480#issuecomment-1169960148
• Add ClosureTypeFactory (#​1484), https://github.com/phpstan/phpstan/discussions/7546, thanks @​canvural!
• Handle native function @throws tag in stub file (#​1487), #​7552, thanks @​VincentLanglet!
• Add #[AllowDynamicProperties] PHP 8.2 attribute stub (#​1478), thanks @​andypost!
• Add rule that disallows final private methods on PHP 8.0+ (#​1490), thanks @​herndlm!
• Inherit @immutable phpdoc (#​1489), #​7506, thanks @​herndlm!
• Mark ClassReflection::evictPrivateSymbols() as internal (https://github.com/phpstan/phpstan-src/commit/9138ab2a1b63d9ee31764cc812cca404f265ecb7)

Bugfixes 🐛

• Fix type specification of various string functions with constant strings in a falsey context (#​1488), #​7555, thanks @​herndlm!
• Fix ConstantArrayType creation for preg_split with MREG_SPLIT_OFFSET_CAPTURE (#​1486), #​7554, thanks @​herndlm!
• Reindex constant arrays via shuffle (#​1438), #​6138, thanks @​herndlm!
• Fix union and intersection between StaticType and ThisType (https://github.com/phpstan/phpstan-src/commit/e20e9345f57a7cd760967f459aa1eedfe2eabff8), #​6291, #​7211, #​7550
• Enhance FILTER_VALIDATE_INT option in filter_var (#​1499), #​7608, thanks @​takeokunn!
• Fix handling of str_split / mb_str_split string arg compound types (#​1496), #​7580, thanks @​herndlm!
• Fix Identical type specification of constant types (#​1493), #​7257, #​6781, #​6647, #​5896, #​5474, #​6000, thanks @​herndlm!
• Better StaticType::traverse() (https://github.com/phpstan/phpstan-src/commit/0e257067ff92fbcb37b034cccdbea864a233c198)
• GenericClassStringType::isSuperTypeOf() - do not convert maybe into no (https://github.com/phpstan/phpstan-src/commit/6fba5429b9784801a89cdc6cfa3d6f8cfd1d82e8), #​6697
• Fix subtractable StaticType (https://github.com/phpstan/phpstan-src/commit/0906336d29e807baba1a9eeca7b1545240c4ce5c), #​6443

Function signature fixes 🤖

• Fix return type of octdec() (#​1500), thanks @​zonuexe!

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