Support Plug-n-Play (yarn v2)

[brandon-leapyear]

I'm submitting a...

[ ] Regression 
[x] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Running tests with yarn version 2 shows a bunch of errors like

The "apollo-server-express" package is missing. Please, make sure to install this library ($ npm install apollo-server-express) to take advantage of GraphQLModule.

Yarn version 2 started using the Plug-n-Play API, which prevents packages from require-ing dependencies not explicitly listed in the package's package.json. I'm not sure what the best solution is, but one solution is to add apollo-server-express as a peer dependency for @nestjs/graphql. This workaround works for me

# .yarnrc.yml
packageExtensions:
  '@nestjs/graphql@*':
    peerDependencies:
      'apollo-server-express': '*'
      '@apollo/federation': '*'

Also see: nestjs/nest#5836

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Environment

Nest version: X.Y.Z

 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[PiDelport]

@nestjs/graphql is also missing peer dependencies for class-transformer and class-validator (requested by @nestjs/mapped-types)

➤ YN0002: │ @nestjs/graphql@npm:7.9.8 [59d7f] doesn't provide class-transformer (pbe5e2), requested by @nestjs/mapped-types
➤ YN0002: │ @nestjs/graphql@npm:7.9.8 [59d7f] doesn't provide class-validator (p7ca35), requested by @nestjs/mapped-types

Workaround:

packageExtensions:
  '@nestjs/graphql@*':
    peerDependencies:
      class-transformer: '^0.3.2'
      class-validator: '^0.13.1'

[kamilmysliwiec]

Let's track this here #1439