README.md in cognito_token_verifier-0.2.0 vs README.md in cognito_token_verifier-0.3.0

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+ new

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 # CognitoTokenVerifier [![Build Status](https://travis-ci.org/CodingAnarchy/cognito_token_verifier.svg?branch=master)](https://travis-ci.org/CodingAnarchy/cognito_token_verifier)
 
-Verify and decode AWS Cognito tokens for use in your Ruby application.
+Verify and decode AWS Cognito tokens for use in your Rails 5.2+ application. Rails 4.2 may work on 0.3+, but as it is no longer supported for security fixes by the Rails team, I make no guarantees of this and changes may result that break compatibility.
 
 ## Installation
 
 Add this line to your application's Gemfile:
 