Migrate to debhelper-compat.

debian/changelog

@@ -4,6 +4,7 @@ lxqt-sudo (0.15.0-0ubuntu1) UNRELEASED; urgency=medium
     - Update upstream signing key.
     - Update LXQt build dependencies.
   * Update Standards-version to 4.5.0, no changes needed.
+  * Migrate to debhelper-compat.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Thu, 30 Apr 2020 23:43:45 -0500
 

debian/compat

@@ -1 +0,0 @@
-12

debian/control

@@ -4,7 +4,7 @@ XSBC-Original-Maintainer: LXQt Packaging Team <pkg-lxqt-devel@lists.alioth.debia
 Uploaders: Simon Quigley <tsimonq2@ubuntu.com>
 Section: x11
 Priority: optional
-Build-Depends: debhelper (>= 12),
+Build-Depends: debhelper-compat (= 12),
                libkf5windowsystem-dev,
                liblxqt0-dev (>= 0.15.0),
                libqt5svg5-dev,