Bump debhelper compat to 12, no changes needed.

debian/changelog

@@ -2,6 +2,7 @@ qtermwidget (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 23:33:39 -0600
 

debian/compat

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

debian/control

@@ -4,7 +4,7 @@ Uploaders: Simon Quigley <tsimonq2@ubuntu.com>
 XSBC-Original-Maintainer: LXQt Packaging Team <pkg-lxqt-devel@lists.alioth.debian.org>
 Section: libs
 Priority: optional
-Build-Depends: debhelper (>= 11~),
+Build-Depends: debhelper (>= 12),
                cmake,
                libutf8proc-dev,
                lxqt-build-tools (>= 0.5.0~),