Make squashfs-tools a hard dependency; without it, Lubuntu's installation fails (LP: #1769781).

debian/changelog

@@ -7,6 +7,8 @@ calamares-settings-ubuntu (2) UNRELEASED; urgency=medium
   * Remove calamares from the explicit removal list; we don't need it to
     be there anymore.
   * Lubuntu Next -> Lubuntu.
+  * Make squashfs-tools a hard dependency; without it, Lubuntu's installation
+    fails (LP: #1769781).
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Thu, 10 May 2018 19:11:57 -0500
 

debian/control

@@ -11,6 +11,6 @@ Vcs-Browser: https://git.launchpad.net/~lubuntu-next/+git/calamares-settings-ubu
 
 Package: calamares-settings-lubuntu
 Architecture: all
-Depends: calamares, ${misc:Depends}
+Depends: calamares, squashfs-tools, ${misc:Depends}
 Description: Lubuntu Calamares Settings and Branding
  This package contains the calamares settings and branding for Lubuntu Next.