Update dependency phpstan/phpstan to v1.8.2

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.8.1 -> 1.8.2

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Release Notes

phpstan/phpstan

v1.8.2

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Improvements 🔧

• Basic support for PHP 8.2
  • #[\AllowDynamicProperties] attribute support (RFC)
  • #[\SensitiveParameter] attribute support (RFC)
  • Updated function signatures
  • Fixed deprecations in PHPStan
• --debug: print previous exceptions (https://github.com/phpstan/phpstan-src/commit/a342b2bea01895e921c5f669a9a53bd0b1402ed3), #​7590
• Changed the MutatingScope class to not include impossible arms in it's resulting union type. (#​1515), thanks @​mad-briller!

Bugfixes 🐛

• Properly cache late resolvable types results (#​1518), #​7637, thanks @​rvanvelzen!
• Fix supertype checks between late resolvable types (#​1523), #​7652, thanks @​rvanvelzen!

Function signature fixes 🤖

• Update AppendIterator stub (#​1517), thanks @​drupol!
• Update CachingIterator::getCache stub (#​1519), thanks @​drupol!

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