implement automatic versioning

assets/de.shorsh.discord-screenaudio.metainfo.xml.in

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>de.shorsh.discord-screenaudio</id>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0+</project_license>
+  <name>discord-screenaudio</name>
+  <releases>
+    <release version="${DISCORD_SCEENAUDIO_VERSION_FULL}" />
+  </releases>
+
+  <summary>
+    A very WIP custom discord client that supports streaming with audio on
+    Linux.
+  </summary>
+
+  <description>
+    <p>A very WIP custom discord client that supports streaming with audio on Linux, made possible by the great work of @edisionnano and the Rohrkabel library by @Curve.</p>
+    <p>The purpose of this project is not to provide an alternative to the original Discord client. Rather, it should be used in addition to the original client in case you want to stream something, maybe used with a second account. For anything else, this client has way too many things that work less well than in the original client.</p>
+  </description>
+
+  <launchable type="desktop-id">
+    discord-screenaudio.desktop
+  </launchable>
+
+  <screenshots>
+    <screenshot type="default">
+      <image>
+        https://user-images.githubusercontent.com/48161361/179571245-11ea05f3-fb5e-4aef-9132-2736e122ef04.png
+      </image>
+    </screenshot>
+  </screenshots>
+
+  <url type="homepage">https://github.com/maltejur/discord-screenaudio</url>
+
+  <provides>
+    <binary>discord-screenaudio</binary>
+  </provides>
+</component>