add mergify

Author: paulfantom

.mergify.yml

@@ -0,0 +1,24 @@
+---
+pull_request_rules:
+  - name: automatic merge and new release from cloudalchemybot
+    conditions:
+      - "status-success=Travis CI - Pull Request"
+      - status-success=WIP
+      - head=autoupdate
+      - author=cloudalchemybot
+    actions:
+      merge:
+        method: squash
+  - name: automatic merge repository sync from cloudalchemybot
+    conditions:
+      - "status-success=Travis CI - Pull Request"
+      - status-success=WIP
+      - head=skeleton
+      - author=cloudalchemybot
+    actions:
+      merge:
+        method: squash
+  - name: delete head branch after merge
+    conditions: []
+    actions:
+      delete_head_branch: {}