fix(build): Start firefox on travis

Kent C. Dodds · Kent C. Dodds · commit 9759df29d8ae · 2015-09-25T23:53:25.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -12,6 +12,8 @@ node_js:
   - iojs
 before_install:
   - npm i -g npm@^2.0.0
+  - "export DISPLAY=:99.0"
+  - "sh -e /etc/init.d/xvfb start"
 before_script:
   - npm prune
 script:
