Update deps

2020.1/aims-artwork/aims-artwork-2020/debian/changelog

+aims-artwork (2020.6) buster; urgency=medium
+
+  * Replace red wallpaper 
+
+ -- Jonathan Carter <jcc@debian.org>  Thu, 25 Apr 2019 13:57:21 +0000
+
 aims-artwork (2020.5) buster; urgency=medium
 
   * Replace red wallpaper 

2020.1/aims-desktop/aims-desktop-2020/debian/changelog

+aims-desktop (2020.34) buster; urgency=medium
+
+  * Add provides/conflicts for desktop-base 
+
+ -- Jonathan Carter <jcc@debian.org>  Fri, 26 Apr 2019 07:07:58 +0000
+
 aims-desktop (2020.33) buster; urgency=medium
 
   * Disable animate app launcher for dash-to-dock 

2020.1/aims-desktop/aims-desktop-2020/debian/control

@@ -194,7 +194,8 @@ Recommends: aims-artwork,
             xul-ext-ublock-origin,
             youtube-dl,
             zram-tools
-Conflicts: sagemath-upstream-binary
+Conflicts: sagemath-upstream-binary, desktop-base
+Provides: desktop-base
 Description: African Institute for Mathematical Sciences desktop metapackage
  This metapackage is used to install AIMS laptops and desktops with
  scientific software such as Jupyter, RStudio, Sage, Texmaker, and restricted