Bump phpstan packages (#225)

* bump deps

* add type perfect

* fix few static errors

improve last arg trailing comma removal

Improve DowngradeInstanceofThrowableRector (#83)

cs

move MethodCallTypeAnalyzer

[Downgrade PHP 7.4] Add return throw to ArrowFunctionToAnonymousFunct…

…ionRectorL (#31)

misc

remove UnionTypeFactory as never used