Update to Nostalgia 2.2

Learn about the important changes from Nostalgia 2.1.x and earlier to 2.2.0 and later.

Increased the minimum operating version of Unity to 2019.4.0f1

The Unity operating version of Nostalgia has been upgraded to Unity 2019.4.0f1.
If you want to use Nostalgia 2.2.0 or later for Unity 2018 or earlier projects, you will also need to update Unity.

MapEditTool window

Moved the Map editing tool from the Map component Inspector to the MapEditTool window.

Changed Nostalgia.Point2 to Obsolete

Changed Nostalgia.Point2 to Obsolete.
Use UnityEngine.Vector2Int instead of Point2.