ProjectSend - Out of Date

Hello Everyone,
Are there plan to update the image?
Since there dockerized version is the R1503 and the latest version is r1070 (released 26/04/19!) I wanted to know if there will an update, and if not - how to manually update it.
Thanks in advice.

GitHub lists 1053 as the latest stable. 1070 is marked as pre-release: https://github.com/projectsend/projectsend/releases

I now see that their website promotes 1070 as the latest stable and perhaps they deemed it stable after several months of pre-release.