First step in tomlifying tox

Following tox-dev/tox#3353 but pending ymyzk/tox-gh-actions#197

Author: paddyroddy

pyproject.toml

@@ -207,6 +207,14 @@ overrides."tool.coverage.paths.source".inline_arrays = false
 overrides."tool.ruff.lint.isort.section-order".inline_arrays = false
 
 [tool.tox]
+env_list = [
+    "py310-linux",
+    "py310-macos",
+    "py311-linux",
+    "py311-macos",
+    "py312-linux",
+    "py312-macos",
+]
 legacy_tox_ini = """
     [gh-actions]
     python =
@@ -218,13 +226,9 @@ legacy_tox_ini = """
     OS =
         ubuntu-latest: linux
         macos-latest: macos
-
-    [testenv]
-    commands =
-        pytest --cov --cov-report=lcov
-    deps =
-        pytest-cov
-
-    [tox]
-    env_list = py{310,311,312}-{linux,macos}
 """
+testenv = {commands = [
+    "pytest --cov --cov-report=lcov",
+], deps = [
+    "pytest-cov"
+]}