This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	`1.5.6` -> `1.5.7`
phpstan/phpstan-phpunit	require-dev	patch	`1.1.0` -> `1.1.1`

phpstan/phpstan

Bugfixes 🐛

Fix array_merge with numeric keys (#1218), thanks @herndlm!
Fix ConstantArrayTypeBuilder optional keys via setOffsetValueType (#1225), thanks @herndlm!
Fix array_push with an empty constant array (#1210), #6974, thanks @herndlm!
Fix array_push / array_unshift with ConstantArrayType arguments (#1232), #5783, thanks @herndlm!
Fix variadic parameters for generics (https://github.com/phpstan/phpstan-src/commit/f091c5629a48620972c657993032522def8a840d), #7068
PHPStan Pro download API - pass current PHP version (https://github.com/phpstan/phpstan-src/commit/9044bfc33d254858ce44969848230477cb8f3ca7)
PHPStan Pro - fix for potential issues on temp files (https://github.com/phpstan/phpstan-src/commit/2a145bad4e3d171e3a917e0f1f3e757bd5a6c523)
Improve variadic parameter support in array_merge (#1233), thanks @herndlm!

phpstan/phpstan-phpunit

4a3c437 - AssertSameBooleanExpectedRule, AssertSameNullExpectedRule - report only ConstFetch
2832aad - Update dependency slevomat/coding-standard to v7.1

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Update all non-major dependencies to v1.5.7 (patch)