def pod_dry_run
      print "Pod dry run..."
      repos = resolved_repos.join ","
      result = system "pod lib lint #{@configuration.podspec_file} --allow-warnings --sources=#{repos}"
      raise "** Pod dry run failed **" if !result
      puts "Done"
    end
def pod_dry_run
      print "Pod dry run..."
      repos = resolved_repos.join ","
      result = system "pod lib lint #{@configuration.podspec_file} --allow-warnings --sources=#{repos}"
      raise "** Pod dry run failed **" if !result
      puts "Done"
    end
runs a pod dry run before tagging