fix type

Author: denini08

tests/test_trustme.py

@@ -288,7 +288,10 @@ def safe_close(sock: Optional[Union[socket.socket, SslSocket]]) -> None:
     if sock is None:
         return
     try:
-        sock.shutdown(socket.SHUT_RDWR)
+        if isinstance(sock, (socket.socket, ssl.SSLSocket)):
+            sock.shutdown(socket.SHUT_RDWR)
+        elif isinstance(sock, OpenSSL.SSL.Connection):
+            sock.shutdown()
     except Exception:
         pass
     try: