close the wrapped sockets to prevent Unraisable ResourceWarnings

tests/test_trustme.py

@@ -258,6 +258,7 @@ def fake_ssl_client(ca, raw_client_sock, hostname):
             # Send and receive some data to prove the connection is good
             wrapped_client_sock.send(b"x")
             assert wrapped_client_sock.recv(1) == b"y"
+            wrapped_client_sock.close()
         except:  # pragma: no cover
             sys.excepthook(*sys.exc_info())
             raise
@@ -271,6 +272,7 @@ def fake_ssl_server(server_cert, raw_server_sock):
             # Prove that we're connected
             assert wrapped_server_sock.recv(1) == b"x"
             wrapped_server_sock.send(b"y")
+            wrapped_server_sock.close()
         except:  # pragma: no cover
             sys.excepthook(*sys.exc_info())
             raise