update version in readme

README.md

@@ -24,12 +24,12 @@ Add dependencies to your pom.xml:
 		<dependency>
             <groupId>us.codecraft</groupId>
             <artifactId>webmagic-core</artifactId>
-            <version>0.4.2</version>
+            <version>0.4.3</version>
         </dependency>
 		<dependency>
             <groupId>us.codecraft</groupId>
             <artifactId>webmagic-extension</artifactId>
-            <version>0.4.2</version>
+            <version>0.4.3</version>
         </dependency>
 
 ## Get Started: