Link to the engine package

Author: veewee

README.md

@@ -1,6 +1,7 @@
 # SOAP Cached Engine
 
-This package contains a cache wrapper for the SOAP engine.
+This package contains a cache wrapper for a SOAP engine.
+For more information about the engine, please check the [php-soap/engine](https://github.com/php-soap/engine) package.
 
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