Drop "@internal" annotation from the InputField class

[andrew-demb]

Since TheCodingMachine\GraphQLite\Middlewares\InputFieldMiddlewareInterface is allowed to be implemented by the userland and its method requires returning an instance of the TheCodingMachine\GraphQLite\InputField (or null) - I'm sure that the InputField class should not be marked with @internal tag - because there is no way to implement middleware without knowledge of the InputField class.

graphqlite/src/InputField.php

Lines 22 to 30 in 5ed662c

	/**
	* A GraphQL input field that maps to a PHP method automatically.
	*
	* @internal
	*
	* @phpstan-import-type InputObjectFieldConfig from InputObjectField
	* @phpstan-import-type ArgumentType from InputObjectField
	*/
	final class InputField extends InputObjectField

[oojacoboo]

Sure. It's already marked as final. Not sure if that @internal annotation was added before the class was updated as final.