Updated README with new version

Author: manub

README.md

@@ -5,7 +5,7 @@ Inspired by https://github.com/chbatey/kafka-unit
 
 ## How to use
 
-* In your `build.sbt` file add the following dependency: `"org.scalatest" %% "scalatest" % "0.2.1"`
+* In your `build.sbt` file add the following dependency: `"org.scalatest" %% "scalatest" % "0.2.2"` (available on Maven Central)
 * Have your `Spec` extend the `EmbeddedKafka` trait.
 * Enclose the code that needs a running instance of Kafka within the `withRunningKafka` closure.