Update travis.yml

.travis.yml

@@ -1,6 +1,10 @@
 language: node_js
-node_js:
+sudo: required
-  - "0.12"
+dist: trusty
-env:
+node_js: '8'
-  global:
+before_install:
-    secure: Qdkmi13nqcXskABBhbuGZmRakh4orOW1dalkSCyUbzGuYf0OdYF8ttNVuJa0WSWI4KhNXhtz2p3I8dM95wL++LCVqXFmIvZtX8Nca36KlNxIPNXPjn0odayh+c4pgrhrbz8TDmDXl9IPuZmNz8HHtN7xmIn6YDcm13wA3gTmfwo=
+  - sudo apt-get update
+  - sudo apt-get install -y build-essential
+install:
+  - npm install
+  - npm run build