fix: 修复$callMethod测试例错误

pages/component-instance/methods/call-method-define-expose.uvue

@@ -21,8 +21,8 @@
       this.component = this.$refs['comp'] as ComponentPublicInstance;
     },
     methods: {
-      callMethod() {
-        return this.component!.$callMethod('test', 'call-method-define-expose')
+      callMethod() : string {
+        return this.component!.$callMethod('test', 'call-method-define-expose') as string
       }
     }
   }

pages/component-instance/methods/component-define-expose.uvue

@@ -3,7 +3,7 @@
 </template>
 
 <script setup>
-  function test(name: string) {
+  function test(name : string) : string {
     return `hello ${name}`
   }
   defineExpose({