chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

chore(package): release on chore, refactor, and style

docs(readme): add homebrew prerequisite

docs(readme): add yarn prerequisite

docs(readme): add pre-commit prerequisite

docs(readme): remove prettier-standard badge

docs(code of conduct): add code of conduct

docs(readme): update readme

docs(readme): add prettier-standard badge

docs(readme): reorganize badges