Github Actions

[8eecf0d2]

Would be cool to integrate Github Actions and drop Travis dependency - have just tried to implement with little success and could not filter by tag or figure out how to only yarn publish based on tag.

Not really interested in testing this so PR appreciated.

Desired Result

Workflow for develop, feature/* and hotfix/* branches

1. yarn install
2. yarn test

Workflow for tagged master branch

1. branch = master, tag = *.*.*
2. yarn install
3. yarn test
4. yarn publish

[patrickblackjr]

https://github.com/nuxt/actions-yarn will be useful