This is to upgrade cypari to 2.1.2 (which is compatible with pari 2.13 that is about to be upgraded too, see #30801)

• ​https://files.pythonhosted.org/packages/22/d9/4374baf5749257362f6d163096f9f5a3fa2a6f231edbe0d61c7bdf281d6e/cypari2-2.1.2.tar.gz

CC: @dimpase @orlitzky @mkoeppe @slel @antonio-rojas @kiwifb @videlec @tobihan @seblabbe @fchapoton @jhpalmieri

Component: packages: standard

Keywords: sd111

Author: Vincent Delecroix

Branch/Commit: b9aadfd

Reviewer: Matthias Koeppe, John Palmieri

Issue created by migration from https://trac.sagemath.org/ticket/31029