Update README.md

Some react version compatibility is missing. Not sure how that should be noted. Maybe also add some link to timarney#162 so people coming in with react or react-native apps that can't be rewired won't send in unwanted bug reports about things not working that are not supposed to be working.

Author: sesam

README.md

@@ -4,7 +4,9 @@
 
  <img alt="react-app-rewired" src="https://github.com/timarney/react-app-rewired/raw/master/assets/react-app-rewired.png" />
 
-# Rewire Your App
+# Rewire Your React 1.x App
+
+_NOT compatible with react-native_
 
 Tweak the create-react-app webpack config(s) without using 'eject' and without creating a fork of the react-scripts.