Add ^ to react-helmut

Author: justin808

spec/dummy/client/package.json

@@ -33,7 +33,7 @@
     "postcss-loader": "^1.3.3",
     "react": "^15.5.4",
     "react-dom": "^15.5.4",
-    "react-helmet": "5.0.3",
+    "react-helmet": "^5.0.3",
     "react-on-rails": "file:../../..",
     "react-proptypes": "^0.0.1",
     "react-redux": "^5.0.4",