Packaging cleanup

* Declare compliance with policy 4.5.1
* Bump debhelper compat level to 13
* Set Rule-Requires-Root: no
* Update Priority:
* Re-format debian/rules

debian/compat

@@ -1 +0,0 @@
-11

debian/control

@@ -1,13 +1,14 @@
 Source: ykush-control
 Maintainer: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
 Homepage: https://github.com/Yepkit/ykush
-Standards-Version: 4.2.1
+Standards-Version: 4.5.1
 Vcs-Browser: https://git.in-ulm.de/cbiedl/ykush-control
 Vcs-Git: https://git.in-ulm.de/cbiedl/ykush-control.git
-Build-Depends: debhelper (>= 11~),
+Build-Depends: debhelper-compat (= 13),
     libusb-1.0-0-dev,
     pandoc,
-Priority: extra
+Priority: optional
+Rules-Requires-Root: no
 Section: utils
 
 Package: ykush-control

debian/rules

@@ -5,10 +5,10 @@ export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 %:
 	dh $@
 
-override_dh_installman:
-	pandoc --standalone --to man debian/ykushcmd.md -o debian/ykushcmd.1
-	dh_installman
-
 override_dh_auto_clean:
 	dh_auto_clean
 	-rm debian/ykushcmd.1
+
+override_dh_installman:
+	pandoc --standalone --to man debian/ykushcmd.md -o debian/ykushcmd.1
+	dh_installman