updated travis

.travis.yml

@@ -2,6 +2,10 @@ language: node_js
 node_js:
 - 4
 - stable
+before_install:
+- sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+- sudo apt-get update
+- sudo apt-get install -y libstdc++-4.9-dev
 deploy:
   provider: npm
   email: npm@lossless.digital