Update to NextCloud 18.0.0

defaults/main.yml

 ---
 
-nextcloud_version: 17.0.2
+nextcloud_version: 18.0.0
 nextcloud_plugins:
   - announcementcenter
   - apporder
@@ -31,6 +31,8 @@ nextcloud_plugins:
   - group_everyone
   - guests
   - impersonate
+  - keeweb
+  - mail
   - maps
   - metadata
   - news
@@ -39,7 +41,6 @@ nextcloud_plugins:
   - phonetrack
   - polls
   - previewgenerator
-  - rainloop
   - ransomware_detection
   - ransomware_protection
   - registration
@@ -61,3 +62,4 @@ nextcloud_plugins_off:
   - caniupdate
   - twainwebscan
   - radio
+  - rainloop