[Feature] Provide Official Support to Instal & Update via Sketchpacks
Please provide official support for [Sketchpacks](https://sketchpacks.com/) - this is a project that deserves it. It allows the Sketch plugin developer to keep all their users automatically updated, with no work from their part - updates are delivered automatically from your GitHub repo, when you push to your 'master' branch.

Please have a look their [integrations page](https://github.com/integration/sketchpacks-relay), so we can get not just automatic version numbering, but also **auto-updating** working!