message: ci(release script): add prerelease beta
diff: @@ -8,12 +8,12 @@ const curVersion = require('../lerna.json').version
  const release = async () => {
  console.log(chalk.yellow(`Current version: ${curVersion}`))
  - const bumps = ['patch', 'minor', 'major', 'prerelease', 'premajor']
  + const bumps = ['patch', 'minor', 'major', 'prerelease-alpha', 'prerelease-beta', 'premajor']
  const versions = {}
  bumps.forEach(b => {
  - versions[b] = semver.inc(curVersion, b)
  + const args = b.split('-')
  + versions[b] = semver.inc(curVersion, ...args)
  })
  -
  const bumpChoices = bumps.map(b => ({ name: `${b} (${versions[b]})`, value: b }))
  function getVersion (answers) {
  