rum index supported on pg13?

will rum index from postgrespro be supported in pg13?
numerous errors occur when compiling rum in pg13 and
no replies from github. the differences from pg12
to pg13 seem to be significant

https://github.com/postgrespro/rum

thanks for such a brilliant extension.
perhaps i should jump in and help.

-john

--
Fast is fine, But accuracy is final.
You must learn to be slow in a hurry.
- Wyatt Earp