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 (phpstan/phpstan-src@f091c56), #7068
• PHPStan Pro download API - pass current PHP version (phpstan/phpstan-src@9044bfc)
• PHPStan Pro - fix for potential issues on temp files (phpstan/phpstan-src@2a145ba)
• Improve variadic parameter support in array_merge (#1233), thanks @herndlm!