True TOML config support #44

Job	Run time
test 3.13 on ubuntu-latest	1m 18s
tox env type on ubuntu-latest	54s
test 3.13 on windows-latest	1m 2s
tox env type on windows-latest	1m 5s
test 3.13 on macos-latest	1m 19s
tox env dev on ubuntu-latest	31s
test 3.12 on ubuntu-latest	1m 16s
tox env dev on windows-latest	1m 6s
test 3.12 on windows-latest	1m 2s
tox env docs on ubuntu-latest	1m 19s
test 3.12 on macos-latest	1m 16s
tox env pkg_meta on ubuntu-latest	19s
test 3.11 on ubuntu-latest	1m 18s
tox env pkg_meta on windows-latest	42s
test 3.11 on windows-latest	1m 2s
test 3.11 on macos-latest	1m 18s
test 3.10 on ubuntu-latest	1m 19s
test 3.10 on windows-latest	1m 10s
test 3.10 on macos-latest	1m 20s
test 3.9 on ubuntu-latest	6s
test 3.9 on windows-latest	1s
test 3.9 on macos-latest	1s
test 3.8 on ubuntu-latest	1m 19s
test 3.8 on windows-latest	21s
test 3.8 on macos-latest	41s
	23m 5s

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