Add a missing dep

jvoisin · jvoisin · commit 94af317677ee · 2017-11-21T14:17:47.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,6 +5,7 @@ addons:
       packages:
         - devscripts
         - fakeroot
+        - debhelper
 
 install:
     - git clone --depth 1 https://github.com/plusvic/yara.git yara3
