Add galaxy_info

meta/main.yml

 ---
+galaxy_info:
+  author: Fachschaft Informatik, TU Dortmund
+  description: Configure and enable borgbackup
+  license: MIT
+  min_ansible_version: 2.9
+  platforms:
+    - name: Ubuntu
+      versions:
+        - all
 dependencies:
   - borgbackup
   - role: msmtp_relay