add websocket common pom

pm-common/pom.xml

@@ -47,6 +47,11 @@
             <artifactId>spring-boot-starter-validation</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-websocket</artifactId>
+        </dependency>
+
         <!--常用工具类 -->
         <dependency>
             <groupId>org.apache.commons</groupId>