Bump build dependencies.

debian/changelog

@@ -1,6 +1,7 @@
 compton-conf (0.14.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
+    - Bump build dependencies.
   * Lubuntify the package.
   * Bump Standards-version to 4.3.0, no changes needed.
   * Bump debhelper compat to 12, no changes needed.

debian/control

@@ -12,7 +12,7 @@ Build-Depends: debhelper (>= 12),
                libqt5svg5-dev,
                libqt5x11extras5-dev,
                libx11-dev,
-               lxqt-build-tools (>= 0.5.0~)
+               lxqt-build-tools (>= 0.6.0)
 Standards-Version: 4.3.0
 Vcs-Browser: https://phab.lubuntu.me/source/compton-conf/
 Vcs-Git: https://phab.lubuntu.me/source/compton-conf.git