Set up grouping for dependency updates

[kbrandwijk]

Right now, every update to graphql-import causes two new versions of graphql-cli.

One from graphql-import -> graphql-cli-prepare -> graphql-cli One from graphql-import -> graphcool-binding -> graphql-cli.

This can be fixed by grouping graphql-import and graphcool-binding together in Renovate.

It's even worse with an update to graphql. This will cause updates of both graphql-import and graphql-static-binding, causing two new versions of graphql-cli-prepare and one new version of graphcool-binding, causing three new versions of graphql-cli.

[Urigo]

This is now a monorepo and we are planning to group all the sub-dependencies for Renovate.

Leaving open until we do