upgrade flow-bin dev-dep

Author: Thomas Grainger

package.json

@@ -80,7 +80,7 @@
     "eslint-plugin-flowtype": "^2.35.1",
     "express": "^4.15.4",
     "express3": "*",
-    "flow-bin": "0.52.0",
+    "flow-bin": "^0.63.1",
     "graphql": "^0.12.3",
     "isparta": "4.0.0",
     "mocha": "3.5.0",

yarn.lock

@@ -1643,9 +1643,9 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@0.52.0:
-  version "0.52.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.52.0.tgz#b6d9abe8bcd1ee5c62df386451a4e2553cadc3a3"
+flow-bin@^0.63.1:
+  version "0.63.1"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.63.1.tgz#ab00067c197169a5fb5b4996c8f6927b06694828"
 
 for-in@^1.0.1:
   version "1.0.2"