修复退出登录问题

src/utils/request.js

@@ -11,7 +11,7 @@ service.interceptors.request.use(config => {
 });
 
 service.interceptors.response.use(res => {
-    userLogout(res.headers[global.NEED_LOGOUT]);
+    userLogout(res.headers[global.NEED_LOGOUT.toLowerCase()]);
     return res.data;
 }, error => {
     return Promise.reject(error);