Create auto-assign config

Author: linxuyalun

.github/auto_assign.yml

@@ -0,0 +1,15 @@
+# Set to true to add reviewers to pull requests
+addReviewers: true
+
+# Set to true to add assignees to pull requests
+addAssignees: true
+
+# A list of reviewers to be added to pull requests (GitHub user name)
+reviewers:
+  - linxuyalun
+  - rudeigerc
+
+# A number of reviewers added to the pull request
+# Set 0 to add all the reviewers (default: 0)
+numberOfReviewers: 0
+