Describe the bug
Setuptools prints two warnings:

Installing 'syncplay.resources' as data is deprecated, please list it in `packages`.
Installing 'syncplay.resources.lua.intf' as data is deprecated, please list it in `packages`.

To Reproduce
Steps to reproduce the behavior:

1. Compile Syncplay with setuptools

Expected behavior
No warning should be printed

Version and platform:

• OS: Gentoo Linux
• Syncplay version and build type: Syncplay 1.6.9 from source
• Media player and version: not relevant

Additional context
Python version: 3.10.5
Setuptools version: 62.3.3
Ebuild: syncplay-1.6.9.ebuild in the Gentoo ::guru overlay