Specify the Python versions that GH workflows will test with

Signed-off-by: Martin Hickey <[email protected]>

Author: hickeyma

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = fmt, lint, unit
+envlist = py3-{fmt, lint, unit}
 minversion = 4.4
 
 [testenv]
@@ -16,10 +16,10 @@ commands =
 [testenv:py3]
 basepython = python3.11
 
-[testenv:unit]
+[testenv:py3-unit]
 basepython = {[testenv:py3]basepython}
 
-[testenv:lint]
+[testenv:py3-lint]
 basepython = {[testenv:py3]basepython}
 description = lint with pylint
 deps =
@@ -29,7 +29,7 @@ deps =
 commands =
     {basepython} -m pylint --load-plugins pylint_pydantic fms_mo/ tests/
 
-[testenv:fmt]
+[testenv:py3-fmt]
 basepython = {[testenv:py3]basepython}
 description = format with pre-commit
 deps =
@@ -51,3 +51,9 @@ commands =
     coverage report -m
     coverage xml
     genbadge coverage -s -i coverage.xml
+
+[gh]
+python =
+    3.11 = py311-{unit}
+    3.10 = py310-{unit}
+    3.9 = py39-{unit}