Add required apt packages

DamonOehlman · DamonOehlman · commit 779d238e15f0 · 2015-04-02T20:23:06.000+11:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,6 +5,14 @@ node_js:
   - 0.12
   - iojs
 
+addons:
+  apt:
+    packages:
+    - libx11-dev
+    - zlib1g-dev
+    - libpng12-dev
+    - libxtst-dev
+
 before_script:
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
