Add mtpaint to junior-art

debian/changelog

@@ -11,6 +11,8 @@ debian-junior (1.23) UNRELEASED; urgency=medium
     - Use git Vcs fields
   * tasks/arcade
     - Add tuxpuck
+  * tasks/art
+    - Add mtpaint
   * tasks/games-sim
     - Add wesnoth
   * tasks/games-net

tasks/art

@@ -12,4 +12,4 @@ Description: Debian Jr. Art
 
 Depends: gimp, tuxpaint, xpaint
 
-Depends: inkscape, mypaint
+Depends: inkscape, mypaint, mtpaint