You can fork the spine-runtimes repository on GitHub, enable Actions on your fork, then modify this file in your fork:
https://github.com/EsotericSoftware/spine-runtimes/blob/4.1/.github/workflows/spine-godot.yml#L16
Change the GODOT_TAG
value from 3.5-stable
to master
and the GODOT_VERSION
to whatever you like, e.g. 4.0.alpha
. You can then manually trigger the Build and Publish Godot editor and templates
workflow on GitHub. If the build succeeds, you can download the binaries from GitHub, like for this run:
https://github.com/EsotericSoftware/spine-runtimes/actions/runs/3043534000
We currently simply do not have the resources to support both pre-built 3.5 and 4.0 binaries. 4.0 is still in flux, even if the API is frozen, and has quite a few bugs. Before there's a stable release, we won't be able to suppor it I'm afraid.