更新header

miniapp/app/base/libs/request.js

                 'openid': userInfo.openid || ''
             };
             if (method && method.toUpperCase() === 'POST') {
-                header['content-type'] = 'application/x-www-form-urlencoded';
+                // header['content-type'] = 'application/x-www-form-urlencoded';
+                header['content-type'] = 'application/json';
             }
             return header;
         };