Update doc

JoshLipan · JoshLipan · commit 5bb1db97141e · 2018-11-15T10:33:01.000+08:00
diff --git a/README.md b/README.md
@@ -24,7 +24,7 @@
 <dependency>
     <groupId>cn.jpush.api</groupId>
     <artifactId>jpush-client</artifactId>
-    <version>3.3.8</version>
+    <version>3.3.9</version>
 </dependency>
 ```
 ### jar 包方式
