update asset bundle builder

Assets/YooAsset/Editor/EditorTools.cs

@@ -129,6 +129,21 @@ namespace YooAsset.Editor
         }
         #endregion
 
+        #region PackageManager
+        public static string GetPackageManagerYooVersion()
+        {
+#if UNITY_2019_4_OR_NEWER
+            UnityEditor.PackageManager.PackageInfo packageInfo = UnityEditor.PackageManager.PackageInfo.FindForAssembly(typeof(YooAssets).Assembly);
+            if (packageInfo != null)
+                return packageInfo.version;
+            else
+                return string.Empty;
+#else
+            return string.Empty;
+#endif
+        }
+        #endregion
+
         #region EditorUtility
         /// <summary>
         /// 搜集资源
@@ -559,7 +574,7 @@ namespace YooAsset.Editor
         {
             return path.Replace('\\', '/').Replace("\\", "/"); //替换为Linux路径格式
         }
-    
+
         /// <summary>
         /// 移除路径里的后缀名
         /// </summary>