Group peerDependencies into a single PR

[honzajavorek]

Example situation: apiaryio/dredd-transactions#259

The adapter packages have a peer dependency on the fury package. It's not wise to upgrade them one-by-one, they should get all upgraded together with the fury package. Every time fury and the adapters release a new version, I get four separate PRs. What I need is a single PR updating all of these, and testing their interplay. Every time we have to prepare the PR manually and to manually close the automated PRs.

[kylef]

To add more context, in this particular case these libraries depend on an exact version of a peer dependency, and thus they must be updated together for compatibility. Here's an example dependency graph:

package - greenkeeper managed package
└── dependencies
    ├── fury-adapter-apib-parser
    │   └── peerDependencies
    │       └── [email protected]
    ├── fury-adapter-oas3-parser
    │   └── peerDependencies
    │       └── [email protected]
    └── [email protected]

[travi]

some grouping is supported through https://github.com/greenkeeperio/monorepo-definitions. would defining the project that you want grouped there help with your issue?