Merge pull request #289 from Hummer12007/patch-1

asyncpg: add ARRAY support

Author: fantix

gino/dialects/asyncpg.py

@@ -4,7 +4,8 @@
 
 import asyncpg
 from sqlalchemy import util, exc, sql
-from sqlalchemy.dialects.postgresql import (
+from sqlalchemy.dialects.postgresql import (  # noqa: F401
+    ARRAY,
     CreateEnumType,
     DropEnumType,
     JSON,