Thanks for the information. I'm happy to know it's being tracked, and I will be sure to look on the roadmap first before posting.
Ran into another issue, and I'm sorry if this is obvious, but I'm pretty new to Unity, and game development in general.
When I try to build the project, Windows or Android, I'm getting errors related to the Timeline UPM. It confuses me because I thought scripts in an Editor folder didn't get added to the build list?
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(37,60): error CS0234: The type or namespace name 'Editor' does not exist in the namespace 'UnityEditor' (are you missing an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(38,62): error CS0234: The type or namespace name 'Editor' does not exist in the namespace 'UnityEditor' (are you missing an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(38,42): error CS0246: The type or namespace name 'PropertyDrawer' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(35,40): error CS0246: The type or namespace name 'PropertyDrawer' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(37,2): error CS0246: The type or namespace name 'CustomPropertyDrawerAttribute' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(37,2): error CS0246: The type or namespace name 'CustomPropertyDrawer' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(36,3): error CS0246: The type or namespace name 'CustomEditorAttribute' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(36,3): error CS0246: The type or namespace name 'CustomEditor' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(37,3): error CS0246: The type or namespace name 'CanEditMultipleObjectsAttribute' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(37,3): error CS0246: The type or namespace name 'CanEditMultipleObjects' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(34,2): error CS0246: The type or namespace name 'CustomPropertyDrawerAttribute' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(34,2): error CS0246: The type or namespace name 'CustomPropertyDrawer' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(35,3): error CS0246: The type or namespace name 'CustomEditorAttribute' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(35,3): error CS0246: The type or namespace name 'CustomEditor' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(36,3): error CS0246: The type or namespace name 'CanEditMultipleObjectsAttribute' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(36,3): error CS0246: The type or namespace name 'CanEditMultipleObjects' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(60,24): error CS0115: 'SpineAnimationStateClipInspector.OnInspectorGUI()': no suitable method found to override
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(45,24): error CS0115: 'SpineSkeletonFlipClipInspector.OnInspectorGUI()': no suitable method found to override
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateClipInspector.cs(40,13): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(40,43): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(37,43): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipClipInspector.cs(39,13): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(45,45): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(40,24): error CS0115: 'SpineAnimationStateDrawer.GetPropertyHeight(SerializedProperty, GUIContent)': no suitable method found to override
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineAnimationStateDrawer.cs(45,23): error CS0115: 'SpineAnimationStateDrawer.OnGUI(Rect, SerializedProperty, GUIContent)': no suitable method found to override
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(42,45): error CS0246: The type or namespace name 'SerializedProperty' could not be found (are you missing a using directive or an assembly reference?)
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(37,24): error CS0115: 'SpineSkeletonFlipDrawer.GetPropertyHeight(SerializedProperty, GUIContent)': no suitable method found to override
Packages\com.esotericsoftware.spine.timeline-3.8\Editor\SpineSkeletonFlipDrawer.cs(42,23): error CS0115: 'SpineSkeletonFlipDrawer.OnGUI(Rect, SerializedProperty, GUIContent)': no suitable method found to override