chore(package): update flow-bin to version 0.87.0

Closes #203

Author: greenkeeper[bot]

package.json

@@ -18,7 +18,7 @@
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
     "fixpack": "^2.3.1",
-    "flow-bin": "^0.71.0",
+    "flow-bin": "^0.87.0",
     "npm-run-all": "^4.0.2",
     "nyc": "^11.0.2",
     "remark-cli": "^5.0.0",