Add sunsetting notice

OnlyOneJMJQ · web-flow · commit abd43eb4a212 · 2019-04-17T00:30:44.000-04:00
diff --git a/README.md b/README.md
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+⚠️ **No new changes will be made to this box! Truffle no longer actively maintains official boxes that encourage production use of their included contracts. [We encourage you to take a look at other boxes in our listing that offer authentication](https://truffleframework.com/boxes).**
+
 # React, Redux and Authentication Truffle Box
 
 In addition to Webpack and React, this box adds: react-router, redux and redux-auth-wrapper for authentication powered by a smart contract. Great for building your own auth system.

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`@@ -1,3 +1,5 @@`
	`1`	`+⚠️ No new changes will be made to this box! Truffle no longer actively maintains official boxes that encourage production use of their included contracts. [We encourage you to take a look at other boxes in our listing that offer authentication](https://truffleframework.com/boxes).`
	`2`	`+`
`1`	`3`	`# React, Redux and Authentication Truffle Box`
`2`	`4`
`3`	`5`	`In addition to Webpack and React, this box adds: react-router, redux and redux-auth-wrapper for authentication powered by a smart contract. Great for building your own auth system.`