Add apt packages section

Atry · Atry · commit cd062c393bdc · 2016-08-13T18:09:43.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,9 @@
 sudo: false
 
+addons:
+ apt:
+   packages:
+
 language:
 
 before_cache:
