Merge branch 'main' of github.com:cdoolin/asyncodbc into cdoolin-main

Author: waketzheng

asyncodbc/pool.py

@@ -192,7 +192,7 @@ async def release(self, conn):
             self._terminated.remove(conn)
             return
         self._used.remove(conn)
-        if conn.connected:
+        if not conn.closed:
             if self._closing:
                 await conn.close()
             else: