Bug report: UV Maps other than UV0 are not exported

[lackofbindings]

Describe the bug

If you export a mesh that has more than one UV map, only the first one will be exported.

To Reproduce

Steps to reproduce the behavior:

1. Create a mesh that has more than one UV map.
2. Export as VRM.
3. View in another tool such as Unity Editor and see that only the first UV map was preserved.

Expected behavior

All UV Maps that are present in blender should be present in the export (or at least the first four UV0-UV3).

Desktop

• OS: Windows 11 23H2
• Blender 3.6.17
• Addon Version 2.20.23
• Tested against Unity 2022.3.22f1 with UniVRM v0.127.2 (which is confirmed to have support for multiple UV maps).

[saturday06]

A bug in VRM0 export did not allow the correct UV map to be selected. This has been corrected in the latest version.

VRM1 exports all UVs correctly; VRM0 currently does not support this.

[lackofbindings]

Dang, well UniVRM can't seem to parse the VRM1 files that this addon generates so I was just using VRM0 since they seemed otherwise identical for my uses. I can't technically tell if that's an issue with UniVRM or this addon, but I'll probably have to take this up with UniVRM. Thanks for the explanation.