Add dependencies for docbook-to-man, doxygen

debian/control

 Source: xtpcpp
-Maintainer: Olivier Langella <olivier.langella@u-psud.fr>
-Homepage: http://pappso.inra.fr/bioinfo
 Section: science
 Priority: optional
-Build-Depends: debhelper (>= 9),
-               cmake (>= 2.6),
-               qtbase5-dev,
-               libpappsomspp-dev (>= 0.8.8),
-               libpappsomspp-widget-dev (>= 0.8.8),
-               libodsstream-dev,
-               libqt5svg5-dev,
-               libqcustomplot-dev
-Standards-Version: 3.9.8
+Maintainer: Olivier Langella <olivier.langella@u-psud.fr>
+Uploaders: Filippo Rusconi <lopippo@debian.org>
+Build-Depends: debhelper-compat (= 13),
+ dpkg-dev (>= 1.18.25),
+ cmake (>= 3.12),
+ qtbase5-dev,
+ libpappsomspp-dev (>= 0.8.8),
+ libpappsomspp-widget-dev (>= 0.8.8),
+ libodsstream-dev,
+ libqt5svg5-dev,
+ libqcustomplot-dev,
+ docbook-to-man,
+ doxygen
+Standards-Version: 4.5.0
+Homepage: http://pappso.inra.fr/bioinfo
 
 Package: xtpcpp
 Architecture: any