Make a release guide (or automate some more)

[adrianmcli]

Currently, these are the steps:

1. Bump version manually in package.json
2. Make a git tag with the command git tag -a v2.2.1 -m "this is the release message"
3. Go on Github UI and draft a release with the same version number (remember the "v")

Once pushed, the commit will trigger the Circle CI to initiate publishing. Check NPM to make sure new version has been published: https://www.npmjs.com/package/@studydefi/money-legos