textproc/translate-toolkit: Allow build with py-ruamel.yaml 0.19.0+
- Bump PORTREVISION for package change
It fixes build after 7e7493383b5e027b27e9136282856b66b1d2fa3d.
Reported by: pkg-fallout
(cherry picked from commit 6bebb158d657822d5964f63acb61920f7b6b62a1)