Bump build dependencies.

debian/changelog

@@ -1,6 +1,7 @@
 lxqt-policykit (1.4.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
+  * Bump build dependencies.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Sun, 12 Nov 2023 18:51:40 -0600
 

debian/control

@@ -9,7 +9,7 @@ Section: x11
 Priority: optional
 Build-Depends: debhelper-compat (= 13),
                libkf5windowsystem-dev,
-               liblxqt1-dev (>= 1.3.0),
+               liblxqt1-dev (>= 1.4.0),
                libpolkit-agent-1-dev,
                libpolkit-qt5-1-dev,
                libqt5svg5-dev,