update version

Author: baiyubin2020

pom.xml

@@ -11,7 +11,7 @@
 
     <groupId>com.aliyun.oss</groupId>
     <artifactId>aliyun-sdk-oss</artifactId>
-    <version>2.4.0-SNAPSHOT</version>
+    <version>2.4.0</version>
     <packaging>jar</packaging>
     <name>Aliyun OSS SDK for Java</name>
     <description>The Aliyun OSS SDK for Java used for accessing Aliyun Object Storage Service</description>