Update phpstan/phpstan requirement from ^1.0 to ^1.2

[dependabot[bot]]

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

Release notes

Sourced from phpstan/phpstan's releases.

1.2.0

Improvements 🔧

• Support for some features from PHP 8.1
  • Support for new in initializers - RFC (https://github.com/phpstan/phpstan-src/commit/1a102fec28a2901927ce703a540fb82e47d17143)
  • Support for first-class callables - RFC
  • Support for array_is_list() - RFC (#770), thanks @​canvural!
• Support literal-string with encapsed strings (#768), thanks @​craigfrancis!
• Tips for always used properties and constants extensions (https://github.com/phpstan/phpstan-src/commit/2db3c268e26d44125aa728c917ba51ec400b46b3)
• Autowire rules from the rules config section by their class name (https://github.com/phpstan/phpstan-src/commit/50cb90ddc6e6f6bdd248b7ea4bb5002193e808d6)

Bugfixes 🐛

• Type system: ConstantStringType created from ::class is always considered a classname (https://github.com/phpstan/phpstan-src/commit/da34d3f1d642d71d5a5130d371bb243c65b0b195), #5979
• Do not run PHP bug workaround on PHP 8+ where it's fixed (https://github.com/phpstan/phpstan-src/commit/6573959829e3d07e1fa2a93845c973d47a12fdfd), #5954
• Promoted properties do not have a default value (https://github.com/phpstan/phpstan-src/commit/7c8e81dcf88378039ac57da459b4288b7e620a59), #5906
• CleaningParser - do not remove inline @var tags (https://github.com/phpstan/phpstan-src/commit/2652f2dc6c713ba2200df922a62fe651f2e4445e), #5921
• AttributesCheck - do not report named arguments in attributes (https://github.com/phpstan/phpstan-src/commit/6366066f3b28a5bdef0c6a3d533c291a8490e1f8), #5898

Function signature fixes 🤖

• functionMap - removed functions that are reserved keywords and separate AST nodes (https://github.com/phpstan/phpstan-src/commit/08f3e2d02329fa39561356c630d8d561631419d9), #6014

Commits

• cbe085f PHPStan 1.2.0
• 8170c41 Levels start at 0, so there are 10 levels
• 4d6fefa Updated PHPStan to commit c862bb97482bced730988217685a8ae019436ad6
• e33400f Updated PHPStan to commit 5a0d0314ea20b905e952670820554c541db8029c
• 39d0d4e Update text to note that level 9 is the strictest
• 898dca3 Updated PHPStan to commit b42ceb618accbe20651165b0a049da299013e273
• b79d8d0 Updated PHPStan to commit 480c516ce2795d7af27142ac7c370e0d1f6bbb38
• 362e194 Updated PHPStan to commit 7ed316d5983eb5a2601a5c3eb7781f8c06a50503
• bc99be7 Updated PHPStan to commit db456dd6fd79405bbbdac00fddb8ca0acb90ed49
• a0a82d2 Open 1.2-dev
• Additional commits viewable in compare view

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