Updating Travis CI

Adding logical versions and failure ability on nightly builds

Author: vincentkoc

.travis.yml

@@ -1,9 +1,20 @@
 language: node_js
 sudo: false
 node_js:
-  - "8"
-  - "7"
   - "6"
+  - "7"
+  - "8"
+  - "9"
+  - "10"
+  - "11"
+  - "node"
+
+cache: npm
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - node_js: node
 
 script:
   - npm run lint