[3.8] bpo-39815: add cached_property to all (GH-18726) (GH-18728)

Automerge-Triggered-By: @pablogsal.
(cherry picked from commit 217dce9ee6e3cf27a0cedbe1e4a6455776373ec2)

Co-authored-by: Hakan Çelik <hakancelik96@outlook.com>
diff --git a/Lib/functools.py b/Lib/functools.py
index b41dea7..4cde5f5 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -11,7 +11,8 @@
 
 __all__ = ['update_wrapper', 'wraps', 'WRAPPER_ASSIGNMENTS', 'WRAPPER_UPDATES',
            'total_ordering', 'cmp_to_key', 'lru_cache', 'reduce', 'partial',
-           'partialmethod', 'singledispatch', 'singledispatchmethod']
+           'partialmethod', 'singledispatch', 'singledispatchmethod',
+           "cached_property"]
 
 from abc import get_cache_token
 from collections import namedtuple
diff --git a/Misc/ACKS b/Misc/ACKS
index 8fd4df5..ef13d55 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -362,6 +362,7 @@
 Raúl Cumplido
 Antonio Cuni
 Brian Curtin
+Hakan Celik
 Paul Dagnelie
 Lisandro Dalcin
 Darren Dale