Issue

• I'm not using TLauncher (it messes up the skins, also, piracy is not supported)

Describe the bug

Uploads to curseforge end with the "-Snaspshot" [sic] suffix.
This is a typo in your buildscript.

small typo lol

Also, in your buildscript I noticed that you used file("${project.buildDir}/libs/${archivesBaseName}-${version}.jar") a few times. you can actually swap this out with jar.archiveFile, and it will give you the output jar file.
However, it's probably best to instead use remapJar.archiveFile, as although the jar is remapped in-place, this would add a task dependency on the remapJar task.

Thanks :)