Add ability to specify resolver name

It would be nice from reusability standpoint to be able to specify the name of the resolver.

My use case is that I build a resolver with filters for related models in MongoDB. It's not very useful for the user to search by the `ObjectId`.

[Relevant code](https://github.com/graphql-compose/graphql-compose-pagination/blob/master/src/paginationResolver.js#L107)