Merge pull request #18 from solid/fix/node-10

Build on Node 8 and 10

Author: dmitrizagidulin

.travis.yml

@@ -1,7 +1,9 @@
 sudo: false
 language: node_js
 node_js:
-  - "6.0"
+  - "8"
+  - "10"
+  - "node"
 cache:
   directories:
     - node_modules