Graphql-playground: Create different middleware packages for different servers

[kbrandwijk]

Currently, there's only one middleware package, graphql-playground-middleware, surprisingly introduced in the latest release. This is a good step forward, but to minimize unnecessary dependencies, and to align better with the apollo-server-... packages, it would be better to have separate packages for each server type:

graphql-playground-hapi, graphql-playground-express, graphql-playground-koa etc.

[morajabi]

So, I'll do this if others are OK.

[kbrandwijk]

I think this can be closed as implemented?

[timsuchanek]

Yes.