Does it support 2018.4?
I tried to add this to my project but didnt work with 2018.3
will it support 2018.4 or is it better to upgrade it to 2019.1?
For 2018.4, you will need to use the 2018.3 branch (https://github.com/Unity-Technologies/2d-extras/tree/2018.3).
The current master is targeting the latest version of Unity 2019.2 and has API changes which will prevent use of an older version of Unity.
@mehmetcanhoroz I'm maintaining a branch in my fork ( capnslipp/[email protected] ) that branches off of master here and has fixes and backported syntax to retain compatibility with 2018.4. All in all, not much has changed— the biggest change is just that the com.unity.2d.tilemap was still built-into Unity (within UnityEditor) in 2018.4.