Merge pull request #1290 from chuntaojun/develop

feat(client): @NacosConfigurationProperties support yaml style config

api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java

@@ -49,6 +49,13 @@ public @interface NacosConfigurationProperties {
      */
     String dataId();
 
+    /**
+     * if the config style is yaml
+     *
+     * @return default value is <code>false</code>
+     */
+    boolean yaml() default false;
+
     /**
      * It indicates the properties of current doBind bean is auto-refreshed when Nacos configuration is changed.
      *