Onboard tcanabrava as Package Maintainer

Tomas has previously been a Junior Package Maintainer, but the two
month period is now long up and according to their sponsors their
changes in the KDE packaging ecosystem all looked good.

Fixes archlinux/infrastructure#616



Signed-off-by: Christian Heusel <christian@heusel.eu>

group_vars/all/archusers.yml

@@ -735,6 +735,7 @@ arch_users:
     ssh_key: tcanabrava.pub
     groups:
       - junior-packager
+      - packager
   torxed:
     name: "Anton Hvornum"
     email: "torxed@archlinux.org"