Update dependencies

Author: yannickcr

package.json

@@ -30,9 +30,9 @@
   "devDependencies": {
     "babel-eslint": "^7.2.3",
     "coveralls": "^2.13.1",
-    "eslint": "^3.0.0",
+    "eslint": "^4.0.0",
     "istanbul": "0.4.5",
-    "mocha": "^3.3.0"
+    "mocha": "^3.4.2"
   },
   "peerDependencies": {
     "eslint": "^3.0.0 || ^4.0.0"