update runtime code

1. 新增WebGL专属模式WebPlayMode

Assets/YooAsset/Runtime/AssetSystem/Provider/ProviderBase.cs

@@ -123,7 +123,7 @@ namespace YooAsset
 		/// <summary>
 		/// 销毁资源对象
 		/// </summary>
-		public virtual void Destroy()
+		public void Destroy()
 		{
 			IsDestroyed = true;
 
@@ -140,6 +140,22 @@ namespace YooAsset
 			}
 		}
 
+		/// <summary>
+		/// 销毁资源对象（安全模式）
+		/// </summary>
+		public void DestroySafely()
+		{
+			if (Status == EStatus.Loading || Status == EStatus.Checking)
+			{
+				WaitForAsyncComplete();
+				Destroy();
+			}
+			else
+			{
+				Destroy();
+			}
+		}
+
 		/// <summary>
 		/// 是否可以销毁
 		/// </summary>