Bump dependencies

.travis.yml

@@ -1,10 +1,9 @@
 language: node_js
 
 node_js:
-  - "0.11"
-  - "0.12"
-  - "4.4"
-  - "5.9"
+  - "4"
+  - "5"
+  - "6"
 
 before_script:
   - npm install -g grunt-cli

package.json

@@ -48,14 +48,14 @@
     "grunt-contrib-jshint": "^1.0.0",
     "grunt-contrib-watch": "^1.0.0",
     "grunt-mocha-cov": "^0.4.0",
-    "grunt-mocha-test": "^0.12.7",
-    "grunt-shell": "^1.3.0",
-    "mocha": "^2.4.5",
+    "grunt-mocha-test": "^0.13.2",
+    "grunt-shell": "^2.0.0",
+    "mocha": "^3.1.2",
     "mocha-lcov-reporter": "^1.2.0",
-    "should": "^8.3.1",
+    "should": "^11.1.1",
     "travis-cov": "~0.2.4",
     "winston": "^2.2.0",
-    "winston-email": "0.0.11",
+    "winston-email": "0.1.0",
     "winston-mongodb": "^1.4.0"
   },
   "keywords": [