Update version in gradle to 2.4.1 (#337)

Author: sonologico

build.gradle

@@ -26,7 +26,7 @@ def getProperty = { property ->
 }
 
 group = "com.pusher"
-version = "2.4.0"
+version = "2.4.1"
 sourceCompatibility = "1.8"
 targetCompatibility = "1.8"