chore(package): update flow-bin to version 0.63.0

Closes #16

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "eslint-plugin-jsx-a11y": "^5.1.1",
     "eslint-plugin-prettier": "^2.3.1",
     "eslint-plugin-react": "^7.4.0",
-    "flow-bin": "^0.58.0",
+    "flow-bin": "^0.63.0",
     "flow-coverage-report": "^0.4.0",
     "github-changes": "^1.1.0",
     "jest": "^21.2.1",