chore(package): update flow-bin to version 0.49.1

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "eslint-plugin-flowtype": "^2.34.0",
     "eslint-plugin-import": "^2.3.0",
     "expect": "^1.20.2",
-    "flow-bin": "^0.47.0",
+    "flow-bin": "^0.49.1",
     "jest": "^20.0.4",
     "jscodeshift": "^0.3.30",
     "minimist": "^1.2.0",