Bug 8780 - Lower dependency version for DateTime::TimeZone
The fresh install of Debian, with the debian.koha-community.org
repository, only has version 1.20 by default. As only the most
basic functionality is being used, this version number should be
lowered from 1.26 to 1.20 in ./C4/Installer/PerlDependencies.pm
to make git installations cleaner.
Signed-off-by: wajasu <matted-34813@mypacks.net> Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>