update: 修改激励视频服务器回调参数，增加 destroy 方法

src/platforms/app-plus/service/api/ad/rewarded-video-ad.js

@@ -37,7 +37,7 @@ class RewardedVideoAd {
       this._dispatchEvent('close', { isEnded: e.isEnded })
     })
     rewardAd.onVerify((e) => {
-      this._dispatchEvent('verify', { isValid: e.valid })
+      this._dispatchEvent('verify', { isValid: e.isValid })
     })
     rewardAd.onError((e) => {
       const { code, message } = e
@@ -75,6 +75,9 @@ class RewardedVideoAd {
   getProvider () {
     return this._rewardAd.getProvider()
   }
+  destroy () {
+    this._rewardAd.destroy()
+  }
   _loadAd () {
     this._isLoad = false
     this._rewardAd.load()