Bump build dependencies.

debian/changelog

@@ -1,6 +1,7 @@
 lxqt-sudo (1.4.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
+  * Bump build dependencies.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Sun, 12 Nov 2023 19:10:57 -0600
 

debian/control

@@ -10,7 +10,7 @@ Section: x11
 Priority: optional
 Build-Depends: debhelper-compat (= 13),
                libkf5windowsystem-dev,
-               liblxqt1-dev (>= 1.3.0),
+               liblxqt1-dev (>= 1.4.0),
                libqt5svg5-dev,
                libqt5x11extras5-dev,
                libx11-dev