Fastlane `Bump` lane

Fastfile

desc "Bumps the version and build number on the project"
desc "#### Example:"
desc "```\nfastlane ios bump version:2.0.1 build_number:23\n```"
desc "#### Options"
desc " * **`version`**: The version to set in the Info.plist (`CFBundleShortVersionString`)"
desc " * **`build_number`**: The build number to set in the Info.plist (`CFBundleVersion`)"
desc ""
lane :bump do |options|
  # Prompt version number
  version = nil
  loop do
    version = options[:version] || UI.input("Version?")
    break if version && !version.empty?
  end

  # Prompt build number
  build_number = options[:build_number] || UI.input("Build number (defaults to current timestamp)?")
  build_number = Time.now.to_i if build_number.nil? || build_number.empty?

  # Update plist with new version and build number
  update_info_plist(
    xcodeproj: 'Test.xcodeproj',
    plist_path: 'Test/Info.plist',
    block: proc do |plist|
      plist["CFBundleShortVersionString"] = version
      plist["CFBundleVersion"] = build_number
    end
  )
end