yarn complains about peer dependencies when using the latest version of chartist

[zevdg]

Since chartist is still v0.x.x, yarn considers minor version bumps to be breaking changes as per the semver spec https://docs.npmjs.com/misc/semver#caret-ranges-123-025-004

For this reason, yarn considers chartists current version 0.11.0 to satisfy vue-chartist's peer dependency of ^0.10.1

The fix is simple, I'll give you a PR.