package/dovecot-pigeonhole: bump version to 0.5.19
Release notes:
https://dovecot.org/list/dovecot-news/2022-May/000475.html
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit ade95519e177c80956cad491357c2f60d0de5fff)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>