Support @mercuriusjs/federation@5.0.0 as peerDependency

[djedlajn]

Hello

I'm getting following when trying to upgrade mercurious suite.

While resolving: mercurius-integration-testing@9.0.1
npm ERR! Found: @mercuriusjs/federation@5.0.0
npm ERR! node_modules/@mercuriusjs/federation
npm ERR!   @mercuriusjs/federation@"^5.0.0" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peerOptional @mercuriusjs/federation@"^1 || ^2" from mercurius-integration-testing@9.0.1
npm ERR! node_modules/mercurius-integration-testing
npm ERR!   dev mercurius-integration-testing@"^9.0.1" from the root project
npm ERR! 
npm ERR! Conflicting peer dependency: @mercuriusjs/federation@2.0.0
npm ERR! node_modules/@mercuriusjs/federation
npm ERR!   peerOptional @mercuriusjs/federation@"^1 || ^2" from mercurius-integration-testing@9.0.1
npm ERR!   node_modules/mercurius-integration-testing
npm ERR!     dev mercurius-integration-testing@"^9.0.1" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
 

Meaning that mercurius-integration-testing@9.0.1 expects @mercuriusjs/federation to be version 1.x or 2.x (as specified in its peer dependencies) and the latest is 5.x could we bump the peer deps if possible to enable it to work with latest version of it.

[djedlajn]

Opened #28 to mitigate the issue.