Feature request: allow configuration in TOML file with new TOML-native tox config

[Secrus]

In recent versions tox got support for native TOML configuration. It would be nice to be able to configure tox-gh-actions in TOML too.

[abelcheung]

The bizarre thing is, it already works! But there's some trick: the version: factor part must be specified as a multiline string:

[tool.tox.gh-actions]
python = """
	3.8: py38
	3.9: py39
	3.10: py310
	3.11: py311
	3.12: py312
	"""

It takes advantage of fact that tox-gh-actions internally parses this part using string processing. @ymyzk may decide to revamp the syntax for TOML support. Or maybe not.

[Secrus]

Yeah, but that is basically the same as what tox had before, inline INI syntax. Native TOML support should be nicer I guess.

[abelcheung]

Native TOML support should be nicer I guess.

Wish it could be too, but apparently not now. In particular, tox TOML config doesn't support conditioanl factor currently, and there is no replacement except going back to ini. Perhaps this issue can go hand in hand with #178 .

Anyway, it's already a bless I don't need to throw away tox-gh-actions right now while migrating to TOML.