It looks like the gnupg package is pinned at 2.2.32 with the following note:
;; Note2: 2.2.33 currently suffers from regressions, so do not update to it ;; (see: https://dev.gnupg.org/T5742). However, the bug referenced here is fixed in upstream commit 4cc724639c012215f59648cbb4b7631b9d352e36, which shipped in gnupg 2.2.34. Meanwhile, all gnupg releases older than 2.2.35 suffer from an S/MIME key-parsing bug (referenced in https://www.mail-archive.com/gnupg-users@gnupg.org/msg40758.html). I believe the pin on 2.2.32 can be lifted, but as gnupg is important infrastructure I am unsure about directly submitting a patch to update to a newer version. Ethan