Update .travis.yml (buehler#162)

* Update .travis.yml

* Update .travis.yml

add node7 to deploy stage

* Update .travis.yml

remove node 6

Author: buehler

.travis.yml

@@ -2,7 +2,6 @@ sudo: false
 
 language: node_js
 node_js:
-- '6'
 - '7'
 
 env:
@@ -16,7 +15,7 @@ os:
 - linux
 
 before_install:
-- if [ $TRAVIS_OS_NAME == "linux" ]; then 
+- if [ $TRAVIS_OS_NAME == "linux" ]; then
     export CXX="g++-4.9" CC="gcc-4.9" DISPLAY=:99.0;
     sh -e /etc/init.d/xvfb start; 
     sleep 3;