Set Vue as a peerDependency?

[afontcu]

And same think with vue-template-compiler (required by vue-test-utils).

We should be using Vue's version provided by the project where VTL is running. Both libraries should be added as a devDependency too.

I guess that'd could be considered a breaking change..?

Any thoughts? Am I missing something? RTL is doing the same thing.

[afontcu]

Closed in #64