configure mergify to merge dependent libs automatically

.mergify

@@ -0,0 +1,41 @@
+shared:
+  required_actions_were_succeeded_or_skipped: &required_actions_were_succeeded_or_skipped
+    - or:
+        - check-success = test
+        - check-skipped = test
+    - or:
+        - check-skipped = test (mariadb)
+        - check-success = test (mariadb)
+    - or:
+        - check-skipped = test (mongodb)
+        - check-success = test (mongodb)
+    - or:
+        - check-skipped = test (postgresql)
+        - check-success = test (postgresql)
+
+pull_request_rules:
+  - name: All required actions were succeeded or skipped
+    conditions:
+      - and: *required_actions_were_succeeded_or_skipped
+    actions:
+      post_check:
+        title: required-actions-were-succeeded-or-skipped
+        success_conditions:
+          - and: *required_actions_were_succeeded_or_skipped
+  - name: Automatic merge for Preparing next version
+    conditions:
+      - author = github-actions[bot]
+      - label = "type/prepare-next-version"
+    actions:
+      review:
+        type: APPROVE
+        message: Automatically approving github-actions[bot]
+      merge:
+        method: merge
+  - name: Automatic merge for Dependabot pull requests
+    conditions:
+    - author = dependabot[bot]
+    - and: *required_actions_were_succeeded_or_skipped
+    actions:
+      merge:
+        method: merge