xbacklight 1.2.4

Alan Coopersmith (4):

• gitlab CI: add a basic build test
• Build xz tarballs instead of bzip2
• gitlab CI: stop requiring Signed-off-by in commits
• Accept --help & --version as aliases to -help & -version

Andreas Tille (1):

• xbacklight.man: Add missing items in SYNOPSIS

Matt Turner (1):

• xbacklight 1.2.4