Update README.md

Author: uklance

README.md

@@ -32,6 +32,7 @@ apply plugin: "com.lazan.dependency-export"
 |Name|Type|Default Value|
 |----|----|-------------|
 |configurations|Collection\<Configuration\>|buildscript.configurations + project.configurations|
+|exportDir|File|${buildDir}/maven-dependency-export|
 |systemProperties|Map\<String, Object\>|System.getProperties()|
 
 ### Sample task customisation