[unity] Updated version numbers in compatibility code checks and version.txt file.

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs

@@ -62,8 +62,8 @@ namespace Spine.Unity.Editor {
 		public const string SkeletonDataSuffix = "_SkeletonData";
 		public const string AtlasSuffix = "_Atlas";
 
-		static readonly int[][] compatibleBinaryVersions = { new[] { 3, 8, 0 } };
-		static readonly int[][] compatibleJsonVersions = { new[] { 3, 8, 0 } };
+		static readonly int[][] compatibleBinaryVersions = { new[] { 3, 8, 0 }, new[] { 3, 9, 0 } };
+		static readonly int[][] compatibleJsonVersions = { new[] { 3, 8, 0 }, new[] { 3, 9, 0 } };
 		//static bool isFixVersionRequired = false;
 
 		/// HACK: This list keeps the asset reference temporarily during importing.

spine-unity/Assets/Spine/version.txt

@@ -1 +1 @@
-This Spine-Unity runtime works with data exported from Spine Editor version: 3.8.xx
+This Spine-Unity runtime works with data exported from Spine Editor version: 3.8.xx and 3.9.xx