Merge pull request #55 from goderbauer/patch-3

Update README.md

Author: DrMarcII

README.md

@@ -4,7 +4,7 @@ Dart Sync WebDriver
 [![Build Status](https://travis-ci.org/google/dart-sync-webdriver.svg?branch=master)](https://travis-ci.org/google/dart-sync-webdriver)
 [![pub package](https://img.shields.io/pub/v/sync_webdriver.svg)](https://pub.dartlang.org/packages/sync_webdriver)
 
-Synchronous WebDriver and PageLoader libraries.
+**NOTE:** Dart Sync WebDriver is **deprecated**. Consider switching to the async [webdriver.dart](https://github.com/google/webdriver.dart).
 
 Installing
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