Update babel, eslint & co

package.json

@@ -33,12 +33,12 @@
   },
   "devDependencies": {
     "assert-diff": "^1.0.1",
-    "babel": "^5.5.4",
-    "babel-core": "^5.5.4",
-    "babel-eslint": "^3.1.23",
-    "babel-loader": "^5.0.0",
+    "babel": "^5.8.21",
+    "babel-core": "^5.8.22",
+    "babel-eslint": "^4.0.5",
+    "babel-loader": "^5.3.2",
     "coveralls": "~2.10.0",
-    "eslint": "^1.0.0",
+    "eslint": "1.0.0",
     "eslint-plugin-flowtype": "^1.0.0",
     "eventemitter2": "^0.4.14",
     "flow-bin": "^0.14",