Use Prettier (#181)

.eslintrc.js

bin/heroku/web.js

bin/update-configuration-table.js

contributing.md

lib/api/github.js

lib/api/gitlab.js

lib/api/npm.js

lib/config/cli.js

lib/config/defaults.js

lib/config/env.js

lib/config/index.js

lib/helpers/package-json.js

lib/helpers/versions.js

lib/helpers/yarn.js

lib/index.js

lib/logger.js

lib/worker.js

lib/workers/branch.js

lib/workers/pr.js

package.json