Remove node 0.6, add node 9-13 on Travis CI.

Author: jaredhanson

.travis.yml

@@ -1,5 +1,10 @@
 language: "node_js"
 node_js:
+  - "13"
+  - "12"
+  - "11"
+  - "10"
+  - "9"
   - "8"
   - "7"
   - "6"
@@ -11,7 +16,6 @@ node_js:
   - "0.12"
   - "0.10"
 #  - "0.8"
-  - "0.6"
 
 
 before_install: