Fix script define for correct unity version

Author: JohannesDeml

Assets/Scripts/Editor/UnityPackageScripts.cs

@@ -21,7 +21,7 @@ public static class UnityPackageScripts
 	{
 		private static int ProgressId;
 		private static ListRequest ListRequest;
-		#if UNITY_2021_1_OR_NEWER
+		#if UNITY_2021_2_OR_NEWER
 		private static AddAndRemoveRequest AddAndRemoveRequest;
 		#else
 		private static AddRequest AddRequest;
@@ -128,7 +128,7 @@ private static void UpdatePackages()
 			Progress.Report(ProgressId, 0.5f, $"Updating {toAdd.Count} packages: {string.Join(", ", toAdd)}");
 #endif
 
-#if UNITY_2021_1_OR_NEWER
+#if UNITY_2021_2_OR_NEWER
 			AddAndRemoveRequest = Client.AddAndRemove(toAdd.ToArray(), toRemove.ToArray());
 			EditorApplication.update += OnWaitForPackageUpdates;
 #else
@@ -138,7 +138,7 @@ private static void UpdatePackages()
 #endif
 		}
 
-#if UNITY_2021_1_OR_NEWER
+#if UNITY_2021_2_OR_NEWER
 		private static void OnWaitForPackageUpdates()
 		{
 #if UNITY_2020_1_OR_NEWER