re-added dub to the list of installed programs.

Author: 1100110

.travis.yml

@@ -1,7 +1,7 @@
 before_install:
     - sudo wget https://d-apt.googlecode.com/files/d-apt.list -O /etc/apt/sources.list.d/d-apt.list
     - sudo apt-get update && sudo apt-get -y --allow-unauthenticated install d-apt-keyring && sudo apt-get update
-    - sudo apt-get install dmd libncursesw5
+    - sudo apt-get install dub dmd libncursesw5
 
 script:
     dub build