merge with stubgen output

django-stubs/db/backends/postgresql/client.pyi

@@ -1,9 +1,15 @@
+# Stubs for django.db.backends.postgresql.client (Python 3.6)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from django.db.backends.base.client import BaseDatabaseClient
+from typing import Any
+
 from typing import Dict
-
-
 def _escape_pgpass(txt: str) -> str: ...
 
-
-class DatabaseClient:
+class DatabaseClient(BaseDatabaseClient):
+    executable_name: str = ...
     @classmethod
-    def runshell_db(cls, conn_params: Dict[str, str]) -> None: ...
+    def runshell_db(cls, conn_params: Dict[str, str]) -> None: ...
+    def runshell(self) -> None: ...