bpo-39481: PEP 585 for a variety of modules (GH-19423)

- concurrent.futures
- ctypes
- http.cookies
- multiprocessing
- queue
- tempfile
- unittest.case
- urllib.parse

Lib/multiprocessing/queues.py

@@ -14,6 +14,7 @@ import os
 import threading
 import collections
 import time
+import types
 import weakref
 import errno
 
@@ -366,3 +367,5 @@ class SimpleQueue(object):
         else:
             with self._wlock:
                 self._writer.send_bytes(obj)
+
+    __class_getitem__ = classmethod(types.GenericAlias)