Upgraded ff and ffarrays deps

Author: erikras

package.json

@@ -42,9 +42,8 @@
     "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-jsx-a11y": "^6.0.2",
     "eslint-plugin-react": "^7.4.0",
-    "final-form": "^4.0.3",
-    "final-form-arrays": "^1.0.3",
-    "flow": "^0.2.3",
+    "final-form": "^4.0.4",
+    "final-form-arrays": "^1.0.4",
     "flow-bin": "^0.61.0",
     "husky": "^0.14.3",
     "jest": "^21.2.1",