chore(deps): update mix dependencies

Since postgres is now handled via docker-compose instead of asdf, the
restriction mentioned in the comment does not apply anymore.

.drone.yml

@@ -72,6 +72,9 @@ trigger:
   event:
     - cron
     - custom
+    - push
+  branch:
+    - main
 
 environment:
   LOG_LEVEL: debug

renovate.json

@@ -8,8 +8,17 @@
     },
     {
       "groupName": "asdf tool versions",
-      "description": "Keep in mind that Renovate currently does not support updating PostgreSQL via asdf.",
       "matchFileNames": [".tool-versions"]
+    },
+    {
+      "groupName": "postgres",
+      "description": "Group updates to postgres across drone ci, docker-compose.yml and other files",
+      "matchDepNames": ["postgres"]
+    },
+    {
+      "matchFileNames": [".tool-versions"],
+      "matchPackageNames": ["elixir"],
+      "enabled": false
     }
   ]
 }