Updating Node and NPM requirements in package + travis to work with Dockerfile node versions (6.x has incremented)

.travis.yml

@@ -2,7 +2,7 @@ language: node_js
 dist: trusty
 sudo: false
 node_js:
-  - "6.11.1"
+  - "6.11.2"
 env:
   - NODE_ENV=travis TRAVIS=travis CXX=g++-4.8
 services:

package.json

@@ -13,8 +13,8 @@
     "url": "https://github.com/whitef0x0/tellform.git"
   },
   "engines": {
-    "node": "6.11.1",
-    "npm": "3.3.6"
+    "node": "6.11.2",
+    "npm": "3.10.10"
   },
   "scripts": {
     "addcontrib": "all-contributors add",