Bump version to 2.18.6

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: zhansheng.lzs

pom.xml

@@ -40,7 +40,7 @@
     <name>DashScope Java SDK</name>
     <groupId>com.alibaba</groupId>
     <artifactId>dashscope-sdk-java</artifactId>
-    <version>2.18.1</version>
+    <version>2.18.6</version>
 
     <properties>
         <maven.compiler.source>8</maven.compiler.source>
@@ -143,6 +143,15 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.sonatype.central</groupId>
+                <artifactId>central-publishing-maven-plugin</artifactId>
+                <version>0.8.0</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <publishingServerId>central</publishingServerId>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-eclipse-plugin</artifactId>