Update README.md

Author: Jzow

README.md

@@ -21,7 +21,7 @@ Summer MyBatis is an ORM framework based on rust language and mybatis framework.
 * Add mybatis dependency
 
     ```rust
-    mybatis = { version = "2.0.1"}
+    mybatis = { version = "2.0.3"}
 
     /// other dependencys
     serde = { version = "1", features =  ["derive"] }