Update README.md (#51)

Author: kwn

README.md

@@ -1,9 +1,9 @@
-# Stubs for PHP Rdkafka extension (4.0 version)
+# Stubs for PHP Rdkafka extension (6.0.4 version)
 
 [![Build Status](https://travis-ci.org/kwn/php-rdkafka-stubs.svg?branch=master)](https://travis-ci.org/kwn/php-rdkafka-stubs)
 [![Latest Stable Version](https://poser.pugx.org/kwn/php-rdkafka-stubs/v/stable)](https://packagist.org/packages/kwn/php-rdkafka-stubs)
 
-This package provides you a set of stubs for [RdKafka extension](https://github.com/arnaud-lb/php-rdkafka). It currently supports version 6.0. For older verisions of rdkafka extenstion (3.x and 0.9) please use version 1.x of this repository. 
+This package provides you a set of stubs for [RdKafka extension](https://github.com/arnaud-lb/php-rdkafka). It currently supports version >6. For older verisions of rdkafka extenstion (3.x and 0.9) please use version 1.x of this repository. 
 
 ## Installation