3.9
[3.9] bpo-46110: Add a recursion check to avoid stack overflow in the PEG parser (GH-30177) (#30215)
[3.9] gh-133767: Fix use-after-free in the unicode-escape decoder with an error handler (GH-129648) (GH-133944) (#134346)
bpo-40334: Fix error location upon parsing an invalid string literal (GH-19962)
bpo-40334: Make the PyPegen* and PyParser* APIs more consistent (GH-19839)
[3.9] gh-95778: CVE-2020-10735: Prevent DoS by very large int() (#96502)
bpo-43555: Report the column offset for invalid line continuation character (GH-24939) (#24975)