File _service of Package jenkins-plugin-manager

<services>
 <service name="download_url">
   <param name="url">https://api.github.com/repos/jenkinsci/plugin-installation-manager-tool/releases/latest</param> 
 </service>
 <service name="set_version">
   <param name="fromfile">_service:download_url:latest</param>
   <param name="regex">.*"name"\s*:\s*"(.*)"</param>
 </service>
 <service name="download_files" />
</services>