message: Remove optional releases section from appdata.xml
  This removes the releases section to make the creation of new releases a
  bit simpler.
diff: </keywords>
  <url type="homepage">https://github.com/alacritty/alacritty</url>
  <url type="bugtracker">https://github.com/alacritty/alacritty/issues</url>
  - <releases>
  - <release version="0.7.0-dev" date="2019-06-16" unix_timestamp="1560694196"/>
  - </releases>
  <update_contact>https://github.com/alacritty/alacritty/blob/master/CONTRIBUTING.md#contact</update_contact>
  <developer_name>Christian Duerr</developer_name>
  </component>
  