Preconfigured decorators aliases

[MichalLytek]

This feature is kind partial apply equivalent from functional programming paradigm.

It gives you an ability to create decorators that have some options binded,
like @NullableField() === @Field({ nullable: true }):

const NullableField = createDecoratorAlias(Field, { nullable: true });
const AbstractResolver = createDecoratorAlias(Resolver, { isAbstract: true });
const IntField = createDecoratorAlias(Field, type => Int);

This might help to avoid common boilerplate and also can be useful for other libraries integration purposes.