addResolversToSchema example no longer functional after Apollo update

[dobrynin]

Describe the issue
The Apollo Federation example no longer works as written in this file: https://github.com/MichalLytek/type-graphql/blob/master/examples/apollo-federation/helpers/buildFederatedSchema.ts

Apollo has changed how __resolveReference works and has improved support for Directives in a federated graph. Issues discussed in #369 can likely be dealt with now.

See here for the discussion in the federation repo about this issue: apollographql/federation#1747

Are you able to make a PR that fix this?
I currently don't have enough understanding of type-graphql internals to propose a specific code change for this. At a minimum we can update the sample code to use the workaround discussed in the Federation repo (all this involves is changing where addResolversToSchema is imported from).

[MichalLytek]

This is part of examples, documentation not a core code. It's highly possible that it might be outdated and does not work with the latest version. I will do my best to update it along with the v16 branch.

[dobrynin]

Thanks @MichalLytek! Appreciate your excellent work on this library.

[MichalLytek]

Closed by #1331 🔒