Increase debhelper compatibility version to 13 as pointed out by
lintian:
P: tweeper source: package-uses-old-debhelper-compat-version 12
Section: php
Priority: optional
Maintainer: Antonio Ospite <ao2@ao2.it>
-Build-Depends: debhelper-compat (= 12), pkg-php-tools
+Build-Depends: debhelper-compat (= 13), pkg-php-tools
Build-Depends-Indep: asciidoc, xmlto
Standards-Version: 4.5.0
Homepage: https://git.ao2.it/tweeper.git