修复uni.request示例的语法警告

pages/API/request/request.uvue

@@ -90,7 +90,7 @@
         pageVisible: false,
         host: "http://request.dcloud.net.cn",
         url: "/api/http/method/get",
-        method: "GET",
+        method: "GET" as RequestMethod | null,
         data: null as any | null,
         header: null as UTSJSONObject | null,
         errorCodeUrls: [
@@ -143,7 +143,7 @@
       this.task?.abort();
     },
     methods: {
-      changeMethod(e : string) {
+      changeMethod(e : RequestMethod) {
         this.method = e;
         this.url = methodMap[e] as string;
         this.data = null;
@@ -239,4 +239,4 @@
       }
     }
   }
-</script>
\ No newline at end of file
+</script>