Add the auto release process

[zephraph]

This PR adds auto to automatically release changes on PRs. I still have work to do around setting env variables in Travis.

Todo

• In CI create an .npmrc file w/ a publish token
• Add GH_TOKEN to CI

[orta]

I added you as an admin, so you should be able to do the CI stuff

[zephraph]

I'll round back up on this tomorrow. I've just got to remember how you set keys in Travis 😄 . It's been a minute.

[zephraph]

@orta or @alloy... what github account do you want to be responsible for pushing these changes? I ultimately need an npm & github token. Is there a relay-tools bot?

[alloy]

There is no such bot. I can create tokens for you on my account for now, I'll reach out to you privately.

[zephraph]

@alloy this is ready for your final review/merging

One note: there's a command that checks the PR for a sem-ver label. If a label isn't present, it'll fail the PR. Adding a label doesn't actually rerun the build... so you can either ignore the error after adding the label and merge anyway or manually retrigger the build. Really can't wait for github actions to become public....

[alloy]

Awesome, thanks! Looks great, so let’s do this 🚀✨

[kastermester]

@zephraph Is it possible to get the version tagged in the repo as well? Bonus points if we can generate a commit that updates the version in package.json and tags that commit :) Great work though :D

[alloy]

This must have something to do with it https://travis-ci.org/relay-tools/relay-compiler-language-typescript/builds/577335528#L362