update base node version to 6

aciccarello · aciccarello · commit f75f378f8fe7 · 2018-08-09T01:42:07.000-06:00
also adds 10 as a test version
diff --git a/.travis.yml b/.travis.yml
@@ -2,4 +2,4 @@ sudo: false
 language: node_js
 node_js:
   - 6
-  - 4
+  - 10
diff --git a/package.json b/package.json
@@ -27,7 +27,7 @@
     }
   ],
   "engines": {
-    "node": ">= 4.2.0"
+    "node": ">= 6.0.0"
   },
   "dependencies": {
     "@types/fs-extra": "5.0.1",
