Failing test case for covariant templates

[gsteel]

It is currently not possible to serialize types that are documented with @template-covariant

[gsteel]

FYI: symfony/symfony#64130 but contributing to Symfony looks like hard work

[DavidBadura]

Hey, thanks a lot for pushing this forward in Symfony as well! :)

[gsteel]

It's worth mentioning that you can still annotate your stuff with

/**
 * @template-covariant T of MyType
 */
class Some {
    /**
     * @param MyType $things
     * @psalm-param T $things
     */
    public function __construct(public $things) {}
}