bug修复

src/modules/exam/components/ExamSetting.vue

@@ -110,7 +110,7 @@ export default {
         type: 'config',
         config: {
           enabled_ip_limit: this.config.enabled_ip_limit,
-          ip_limits: this.config.ip_limits,
+          ip_limits: this.config.ip_limits.toString(),
           enabled_promise: this.config.enabled_promise,
           enabled_lock: this.config.enabled_lock,
           max_login_times: this.config.max_login_times,