Update dependency phpstan/phpstan to v1.7.9

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.7.6 -> 1.7.9

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Release Notes

phpstan/phpstan

v1.7.9

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Improvements 🔧

• Read PHPDocs from trait stubs (#​1390), #​5233, thanks @​canvural!
• Infer non-empty-string on str-casing functions comparison with constant string (#​1382), thanks @​staabm!
• Make trait properties and methods first class node citizens (#​1370), thanks @​herndlm!

Bugfixes 🐛

• Support intersection types in MutatingScope::getTypeToInstantiateForNew() (#​1388), #​7374, thanks @​rvanvelzen!

v1.7.8

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Improvements 🔧

• Update nikic/php-parser to 4.14.0 (phpstan/phpstan-src@fbaab8f)

Bugfixes 🐛

• Improve unresolved template type checks for complex conditional types (#​1377), thanks @​rvanvelzen!
• FileCacheStorage - suppress potential file load issue (phpstan/phpstan-src@b73a396)
• Do not overwrite promoted property PHPDoc with constructor PHPDoc (#​1376), #​7361, thanks @​herndlm!
• Fix/native type specification (#​1372), thanks @​rajyan!

Function signature fixes 🤖

• Fix signatures of PDO::pgsqlCopy{From,To}{Array,File} (#​1375), thanks @​takaram!

v1.7.7

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Bugfixes 🐛

• AutoloadFunctionsSourceLocator - avoid ReflectionSourceStubber bugs by trying AutoloadSourceLocator first (#​1373), #​7365, #​7360, #​7363
• BetterReflection - allow class autoloading for invoke() etc. (ondrejmirtes/BetterReflection@2a0638b), #​7333

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