Prepare for 2.4.2 release

Author: sonologico

README.md

@@ -74,7 +74,7 @@ The pusher-java-client is available in Maven Central.
     <dependency>
       <groupId>com.pusher</groupId>
       <artifactId>pusher-java-client</artifactId>
-      <version>2.4.1</version>
+      <version>2.4.2</version>
     </dependency>
 </dependencies>
 ```
@@ -83,7 +83,7 @@ The pusher-java-client is available in Maven Central.
 
 ```groovy
 dependencies {
-  compile 'com.pusher:pusher-java-client:2.4.1'
+  compile 'com.pusher:pusher-java-client:2.4.2'
 }
 ```
 

build.gradle

@@ -26,7 +26,7 @@ def getProperty = { property ->
 }
 
 group = "com.pusher"
-version = "2.4.1"
+version = "2.4.2"
 sourceCompatibility = "1.8"
 targetCompatibility = "1.8"