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

- concurrent.futures
- ctypes
- http.cookies
- multiprocessing
- queue
- tempfile
- unittest.case
- urllib.parse
diff --git a/Lib/http/cookies.py b/Lib/http/cookies.py
index 6694f54..35ac2dc 100644
--- a/Lib/http/cookies.py
+++ b/Lib/http/cookies.py
@@ -131,6 +131,7 @@
 #
 import re
 import string
+import types
 
 __all__ = ["CookieError", "BaseCookie", "SimpleCookie"]
 
@@ -419,6 +420,8 @@
         # Return the result
         return _semispacejoin(result)
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 #
 # Pattern for finding cookie