Yarn v2 compat: add vue to peerDependencies

[AlexandreBonaventure]

Version

3.1.3

Steps to reproduce

When using Typescript, vue-router export types like here: https://github.com/vuejs/vue-router/blob/dev/types/router.d.ts#L1 But as you can see here, it imports Vue typings to make it work. As a matter of fact vue should be added to peerDependencies

What is expected?

vue should be a peerDependency

What is actually happening?

it is not, and it fails in a strict dependency-tree context

Ref: vuejs/vue-cli#5135

[posva]

for anybody doing the PR, please include clear steps about how to test locally with links to instructions to use yarn v2 as I personally don't use it

[Blakelist7]

@posva I would like to give it a shot.
And also could you guide me a little bit where should I look Into ?

[susnux]

Generally vue should be a peer dependency as the types files import from vue but vue is neither listed as a dependency nor as a peerDependency.