Update phpstan/phpstan requirement from ^1.0 to ^1.0 || ^2.0

[dependabot[bot]]

Updates the requirements on phpstan/phpstan to permit the latest version.

Release notes

Sourced from phpstan/phpstan's releases.

2.0.2

Improvements 🔧

• More details about PHP version information in diagnose command (#3609), thanks @​staabm!
• Utilize phpVersion.min and max in VersionCompareFunctionDynamicReturnTypeExtension (#3631), thanks @​staabm!
• Improvements and fixes from PHPStan 1.12.11

Internals 🔍

• Refactor ComposerPhpVersionFactory, ConstantResolver (#3627), thanks @​staabm!

Commits

• 6c98c76 PHPStan 2.0.2
• c684505 Updated PHPStan to commit c684505c9f18c43a34f11e456c418cc501793d72
• da1162b Update errors identifiers
• 65ddbcb Updated PHPStan to commit 65ddbcb6fe3d248076c49af0d1532d0dc4f75460
• 86d3630 Update errors identifiers
• b80f208 Updated PHPStan to commit b80f20879ab84a848d2ed85a808091390b4fceb8
• 1be8a09 Larastan update
• 91bdfb5 Updated PHPStan to commit 91bdfb5bc1f9906ce9ae6d0d122dd926ff9920b0
• c79a752 Updated PHPStan to commit c79a752b7ad8efedbe3bc940c76e81b65866234b
• 1772fd3 Update BACKERS.md
• Additional commits viewable in compare view

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