devel/dyncall: Update to 1.2

Changes: https://dyncall.org/pub/dyncall/dyncall/file/tip/ChangeLog
PR: 252945
Submitted by: Tassilo Philipp <tphilipp@potion-studios.com> (maintainer)
Approved by: fernape (mentor)
Differential Revision: https://reviews.freebsd.org/D28307