Update dependencies

Author: yannickcr

package.json

@@ -25,8 +25,8 @@
   "devDependencies": {
     "babel-eslint": "4.1.3",
     "coveralls": "2.11.4",
-    "eslint": "1.5.1",
-    "istanbul": "0.3.21",
+    "eslint": "1.7.1",
+    "istanbul": "0.4.0",
     "mocha": "2.3.3"
   },
   "keywords": [