Update com.github.parnold-x.timer.appdata.xml

Author: parnold-x

data/com.github.parnold-x.timer.appdata.xml

@@ -31,6 +31,11 @@
         <value key="x-appcenter-color-primary-text">rgb(23, 107, 0)</value>
     </custom>
     <releases>
+        <release version="0.3.0" date="2019-07-19">
+        <description>
+          <p>Release for Juno</p>
+        </description>
+      </release>
       <release version="0.2.0" date="2017-12-01">
         <description>
           <p>This release adds float parsing. So now you can also enter e.g. 3.5 for 3 minutes and 30 seconds</p>