Upgrade angularcontext to 0.0.20 and Node to 4.

Author: thrashr888

.travis.yml

@@ -1,4 +1,6 @@
 language: node_js
 node_js:
-  - "0.10"
+  - "4"
+  - "5"
+  - "6"
 script: npm test && npm run-script lint

package.json

@@ -14,15 +14,15 @@
         "lint": "jshint -c .jshintrc lib/* tests/*"
     },
     "dependencies": {
-        "angularcontext": "0.0.17",
+        "angularcontext": "0.0.20",
         "escape-html": "1.0.0",
         "express": "~3.4.4"
     },
     "devDependencies": {
         "nodeunit": "*",
         "jshint": "2.1.11"
     },
-    "engines" : { 
-        "node" : "~0.10.x" 
+    "engines" : {
+        "node" : ">4"
     }
 }