Merge pull request #63 from numtide/mergify/configuration-deprecated-update

ci(mergify): upgrade configuration to current format

Author: brianmcgee

.mergify.yml

@@ -1,15 +1,14 @@
 queue_rules:
     - name: default
+      queue_conditions:
+          - base=main
+          - label~=merge-queue|dependencies
       merge_conditions:
           - check-success=buildbot/nix-eval
-defaults:
-    actions:
-        queue:
-            merge_method: rebase
+      merge_method: rebase
+
 pull_request_rules:
-    - name: merge using the merge queue
-      conditions:
-          - base=main
-          - label~=merge-queue|dependencies
+    - name: refactored queue action rule
+      conditions: []
       actions:
           queue: