asyncpg: add ARRAY support

Hummer12007 · Hummer12007 · commit 6c0afc21f7de · 2018-08-01T14:28:06.000+03:00
diff --git a/gino/dialects/asyncpg.py b/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,
