Bump debhelper compat to 12, no changes needed.

debian/changelog

@@ -2,6 +2,7 @@ lxqt-about (0.14.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
   * Bump Standards-version to 4.3.0, no changes needed.
+  * Bump debhelper compat to 12, no changes needed.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Fri, 25 Jan 2019 23:46:51 -0600
 

debian/compat

@@ -1 +1 @@
-11
+12

debian/control

@@ -6,7 +6,7 @@ Uploaders: Alf Gaida <agaida@siduction.org>,
            Andrew Lee (李健秋) <ajqlee@debian.org>
 Section: x11
 Priority: optional
-Build-Depends: debhelper (>= 11),
+Build-Depends: debhelper (>= 12),
                libkf5windowsystem-dev,
                liblxqt0-dev (>= 0.13.0),
                libqt5svg5-dev,