Move update rules from 20201213 to 20210321

OpenRA.Mods.Common/UpdateRules/Rules/20210321/ReplaceSequenceEmbeddedPalette.cs

@@ -0,0 +1,31 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2022 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+
+namespace OpenRA.Mods.Common.UpdateRules.Rules
+{
+	public class ReplaceSequenceEmbeddedPalette : UpdateRule
+	{
+		public override string Name => "Replace Sequence EmbeddedPalette with HasEmbeddedPalette.";
+
+		public override string Description => "The EmbeddedPalette sequence option was replaced with a boolean HasEmbeddedPalette.";
+
+		public override IEnumerable<string> UpdateSequenceNode(ModData modData, MiniYamlNode sequenceNode)
+		{
+			foreach (var sequence in sequenceNode.Value.Nodes)
+				if (sequence.RemoveNodes("EmbeddedPalette") > 0)
+					sequence.AddNode("HasEmbeddedPalette", true);
+
+			yield break;
+		}
+	}
+}