Fix monorepo setup

[hipstersmoothie]

• Auto only works at root => move release script to root
• Add lerna to manage monorepo version + add initial setup
• mark docs package as private so lerna doesn't publish it

In relation to: intuit/auto#988

[hipstersmoothie]

This build is failing probably because Travis isn't sharing secrets with untrusted forks.

Travis CI makes encrypted variables and data available only to pull requests coming from the same repository. These are considered trustworthy, as only members with write access to the repository can send them.

Pull requests sent from forked repositories do not have access to encrypted variables or data even if these are defined in the fork source project.

https://docs.travis-ci.com/user/pull-requests/

You might want to check if the NPM_TOKEN exists before running release so builds from forks don't always fail.

EDIT: ^^ I did this in your config 👍

[hipstersmoothie]

This is now failing because of other environment variable but should be good from auto's side

[liorheber]

Yes, I see. Thanks a lot!
Really impressed with Auto by the way. I hope we migrate our internal projects to use it as well.