Exposing set socket hostname (#433)

Author: milos1290

Leanplum-SDK/Classes/Leanplum.h

@@ -188,6 +188,14 @@ extern NSString *const kEnvProduction;
 + (void)setApiHostName:(NSString *)hostName withServletName:(NSString *)servletName usingSsl:(BOOL)ssl
 NS_SWIFT_NAME(setApiHostName(_:servletName:ssl:));
 
+/**
+ * Optional. Sets socket hostname and port
+ * @param hostName The name of the socket host
+ * @param port port of the socket
+ */
++ (void)setSocketHostName:(NSString *)hostName withPortNumber:(int)port
+NS_SWIFT_NAME(setSocketHostName(_:port:));
+
 /**
  * Optional. Adjusts the network timeouts.
  * The default timeout is 10 seconds for requests, and 15 seconds for file downloads.