http请求增加不需要设置请求内容枚举

Signed-off-by: crish <570360737@qq.com>

modules/i3plus-pojo-base/src/main/java/cn/estsh/i3plus/pojo/base/enumutil/CommonEnumUtil.java

@@ -912,6 +912,7 @@ public class CommonEnumUtil {
         FORM("x-www-form-urlencoded", "表单"),
         FILE("multipart/form-data", "文件"),
         JSON("application/json", "JSON"),
+        NONE("default", "默认不需要设置Content-Type"),
         XML("application/xml", "XML");
 
         private String value;