feat(api-select): clear options before fetch

ApiSelect组件在发起新的请求之前先清空已有的options

src/components/Form/src/components/ApiSelect.vue

@@ -106,7 +106,7 @@
       async function fetch() {
         const api = props.api;
         if (!api || !isFunction(api)) return;
-
+        options.value = [];
         try {
           loading.value = true;
           const res = await api(props.params);