convertVersion () {
    const [mainVersion, ...suffix] = this.options.version.split('-')

    if (suffix.length > 0) {
      this.options.version = [mainVersion, suffix.join('-').replace(/\./g, '')].join('-')
    } else {
      this.options.version = mainVersion
    }
  }
Transforms a version string from semver v2 into v1