chore(package): update flow-bin to version 0.47.0 (#35)

Author: greenkeeper[bot]

package.json

@@ -42,7 +42,7 @@
     "eslint-plugin-flowtype": "^2.19.0",
     "eslint-plugin-import": "^2.0.0",
     "eslint-plugin-mocha": "^4.5.1",
-    "flow-bin": "^0.46.0",
+    "flow-bin": "^0.47.0",
     "mocha": "^3.1.0"
   }
 }