chore(package): update flow-bin to version 0.57.2

Closes #3

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
   "license": "MIT",
   "devDependencies": {
     "eslint": "^3.7.0",
-    "flow-bin": "^0.41.0"
+    "flow-bin": "^0.57.2"
   },
   "dependencies": {
     "nodemon": "^1.10.2"