HTTP Cookiejar doesn't support samesite

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-06-19.22:25:23.387>
labels = ['type-feature', 'library', '3.9']
title = "HTTP Cookiejar doesn't support samesite"
updated_at = <Date 2021-06-19.22:25:23.387>
user = 'https://github.com/jwag956'

bugs.python.org fields:

activity = <Date 2021-06-19.22:25:23.387>
actor = 'jwag956'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-06-19.22:25:23.387>
creator = 'jwag956'
dependencies = []
files = []
hgrepos = []
issue_num = 44463
keywords = []
message_count = 1.0
messages = ['396153']
nosy_count = 1.0
nosy_names = ['jwag956']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue44463'
versions = ['Python 3.9']