renovate: automerge ubuntu package updates

renovate.json

@@ -53,6 +53,13 @@
       "matchManagers": ["regex"],
       "enabled": false
     },
+    {
+      "matchPackagePatterns": ["ubuntu_\\d\\d_\\d\\d/.*"],
+      "matchManagers": ["regex"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true,
+      "automergeType": "branch"
+    },
     {
       "groupName": "docker core image",
       "matchPaths": [
@@ -83,5 +90,11 @@
         "src/requirements-tileserver.txt"
       ]
     }
-  ]
+  ],
+  "lockFileMaintenance": {
+    "enabled": true,
+    "automerge": true,
+    "automergeType": "branch"
+  },
+  "ignoreTests": true
 }