Update phpstan/phpstan requirement from 0.12.63 to 0.12.64

[dependabot-preview]

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

Release notes

Sourced from phpstan/phpstan's releases.

0.12.64

Major new feature 🚀

Dependent variables

PHPStan can now understand relationships between different variables. Cases like these are now understood correctly:

if ($debug) {
    $foo = 'bar';
}
if ($debug) {
// previously: Variable $foo might not be defined.
// now: no error
echo $foo;
}

Additionally, this feature fixes all these issues: #801, #806, #1209, #1306, #1722, #1865, #2980, #3371, #3986

Bugfixes 🐛

• Implement property name as an expression in TypesAssignedToPropertiesRule (phpstan/phpstan-src@7458d1e)
• Updated nikic/php-parser (phpstan/phpstan-src@19bf582), #4194

Function signature fixes 🤖

• Changing return type of Collator::compare to int|false (#410), thanks @vasekbrychta!
• Update PHP 8 stubs (phpstan/phpstan-src@4430549), #4268

Commits

• 23eb1cb PHPStan 0.12.64
• 0917e30 Updated PHPStan to commit 3a08cb018572938ca6b90f861c5fbca17baeab4c
• 149a139 Updated PHPStan to commit 6cfb1e18c476c30eb5840419c1f842b690e5ee8a
• 2ca40af Updated PHPStan to commit 1ad0b99cffd137fa414f4a6d8262b81f19a3f8ac
• b2589e5 Updated PHPStan to commit 44305499fe9b4aca8943c8e15382581372f6bd45
• b1f0f84 Add GitHub issue configuration file for support question redirect
• cbe3d22 Updated PHPStan to commit 19bf582aa3c0e0809446a17399d17d17ab40297c
• 35dc950 Updated PHPStan to commit 842625e8c2f11279bc28bdae1e4466028df46930
• 3122e02 website - bump deps
• 11efff7 playground-api - bump deps
• Additional commits viewable in compare view

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