tox mypyc: run on Python 3.13

Author: mr-c

tox.ini

@@ -69,8 +69,7 @@ commands =
   py3{9,10,11,12,13}-unit: make coverage-report coverage.xml PYTEST_EXTRA={posargs}
   py3{9,10,11,12,13}-bandit: bandit -r cwltool
   py3{9,10,11,12,13}-lint: make flake8 format-check codespell-check
-  py3{9,10,11,12,13}-mypy: make mypy PYTEST_EXTRA={posargs}
-  py3{9,10,11,12}-mypy: make mypyc PYTEST_EXTRA={posargs}
+  py3{9,10,11,12,13}-mypy: make mypy mypyc PYTEST_EXTRA={posargs}
   py312-shellcheck: make shellcheck
   py312-pydocstyle: make diff_pydocstyle_report
   py312-lintreadme: twine check {distdir}/*