Upgrade org.dom4j:dom4j to version 2.1.1

weixin-java-common/pom.xml

@@ -117,7 +117,7 @@
     <dependency>
       <groupId>org.dom4j</groupId>
       <artifactId>dom4j</artifactId>
-      <version>2.0.0</version>
+      <version>2.1.1</version>
     </dependency>
   </dependencies>