chore(deps): update phpstan packages to v2 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
phpstan/phpstan	~1.12.0 -> ~2.0.0
phpstan/phpstan-mockery	^1.0 -> ^2.0
phpstan/phpstan-phpunit	^1.1 -> ^2.0

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Release Notes

phpstan/phpstan (phpstan/phpstan)

v2.0.1

Compare Source

v2.0.0

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phpstan/phpstan-mockery (phpstan/phpstan-mockery)

v2.0.0

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• 89a949d - Fix after PHPStan update
• c894582 - Fix after PHPStan update
• bd4d176 - Merge branch '1.1.x' into 2.0.x
• 07ddbb5 - Update build-cs
• d1f1d46 - Stop testing PHP 7.2 and 7.3
• 0b12514 - Open 2.0.x

phpstan/phpstan-phpunit (phpstan/phpstan-phpunit)

v2.0.1

Compare Source

• 4b6ad7f - Fix
• bec49ea - Merge branch '1.4.x' into 2.0.x
• 3cc8554 - Fixes after PHPStan update
• 09e2d3b - Uncover everything behind the bleedingEdge flag
• 4d861e0 - Fix after TypeSpecifier BC break
• 3faa605 - Update build-cs
• 953195d - Stop testing PHP 7.2 and 7.3
• 7f1457f - Open 2.0.x

v2.0.0

Compare Source

• 3cc8554 - Fixes after PHPStan update
• 09e2d3b - Uncover everything behind the bleedingEdge flag
• 4d861e0 - Fix after TypeSpecifier BC break
• 3faa605 - Update build-cs
• 953195d - Stop testing PHP 7.2 and 7.3
• 7f1457f - Open 2.0.x
• 146d9c3 - Test newer PHP versions
• bb6bec0 - Pin build-cs

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