Change the debhelper dependency to 11.

debian/changelog

@@ -1,6 +1,7 @@
 libfm-qt (0.13.1-5ubuntu2) UNRELEASED; urgency=medium
 
   * Change Uploaders to Ubuntu uploaders.
+  * Change the debhelper dependency to 11.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Mon, 30 Jul 2018 19:07:41 -0500
 

debian/control

@@ -4,7 +4,7 @@ XSBC-Original-Maintainer: LXQt Packaging Team <pkg-lxqt-devel@lists.alioth.debia
 Uploaders: Simon Quigley <tsimonq2@ubuntu.com>
 Section: x11
 Priority: optional
-Build-Depends: debhelper (>= 11~),
+Build-Depends: debhelper (>= 11),
                libexif-dev,
                libfm-dev (>= 1.2.0),
                libkf5windowsystem-dev,