True TOML config support #35

Job	Run time
tox env type on ubuntu-latest	49s
test 3.13 on ubuntu-latest	2m 46s
tox env type on windows-latest	1m 55s
tox env dev on ubuntu-latest	37s
test 3.13 on windows-latest	2m 41s
test 3.13 on macos-latest	2m 49s
tox env dev on windows-latest	1m 51s
test 3.12 on ubuntu-latest	2m 48s
tox env docs on ubuntu-latest	2m 49s
test 3.12 on windows-latest	2m 39s
tox env pkg_meta on ubuntu-latest	22s
test 3.12 on macos-latest	2m 50s
tox env pkg_meta on windows-latest	42s
test 3.11 on ubuntu-latest	2m 49s
test 3.11 on windows-latest	2m 40s
test 3.11 on macos-latest	2m 50s
test 3.10 on ubuntu-latest	2m 49s
test 3.10 on windows-latest	2m 41s
test 3.10 on macos-latest	2m 50s
test 3.9 on ubuntu-latest	7s
test 3.9 on windows-latest	30s
test 3.9 on macos-latest	11s
test 3.8 on ubuntu-latest	11s
test 3.8 on windows-latest	34s
test 3.8 on macos-latest	11s
	44m 1s

Provide feedback