Update eslint to v3

Author: leebyron

package.json

@@ -65,10 +65,10 @@
     "chai-json-equal": "0.0.1",
     "chai-subset": "1.2.2",
     "coveralls": "2.11.9",
-    "eslint": "2.11.1",
-    "eslint-plugin-babel": "3.2.0",
+    "eslint": "3.1.1",
+    "eslint-plugin-babel": "3.3.0",
     "eslint-plugin-flow-vars": "0.4.0",
-    "eslint-plugin-flowtype": "2.2.7",
+    "eslint-plugin-flowtype": "2.3.1",
     "flow-bin": "0.29.0",
     "isparta": "4.0.0",
     "mocha": "2.5.3",