Updates renovateapp -> renovatebot

docs: Improve local development information

docs(contributing): fix typo

Instead refer to website and source code.

* chore(deps): update dependency prettier to v1.9.0

* run prettier

This commit drops support for nodejs 6 now that nodejs 8 has reached LTS. Renovate will now publish only the `lib/` directory and not `dist/`. Some babel is necessary to leave in-place because Jest otherwise crashes when encountering the spread operator.

BREAKING CHANGE: Node.js 6 is no longer supported

fixes a few incorrect/outdated commands.

Closes #80