feat(mergify): report merge conflicts for draft PRs

Pull-Request: #3614.

Author: thomaseizinger

.github/mergify.yml

@@ -13,7 +13,6 @@ pull_request_rules:
   - name: Ask to resolve conflict
     conditions:
       - conflict
-      - -draft # Draft PRs are allowed to have conflicts.
       - -author=dependabot[bot]
     actions:
       comment: