chore(package): update flow-bin to version 0.73.0 (#77)

Author: greenkeeper[bot]

package.json

@@ -103,7 +103,7 @@
     "enzyme-to-json": "^3.3.4",
     "eslint": "^4.19.1",
     "eslint-config-insilico": "^5.2.0",
-    "flow-bin": "^0.72.0",
+    "flow-bin": "^0.73.0",
     "flow-copy-source": "^1.3.0",
     "husky": "^0.14.3",
     "intersection-observer": "^0.5.0",