Update some environments to 3.10
Fixes
@@ -456,7 +456,7 @@ commands =
sphinx-build -E -a -W -b html -T . _build/html
[testenv:spellcheck]
-basepython: python3.9
+basepython: python3.10
recreate = True
deps =
codespell
@@ -465,7 +465,7 @@ commands =
codespell
[testenv:lint]
-basepython: python3.9
+basepython: python3.10
recreate = False
deps =
-c dev-requirements.txt
@@ -537,7 +537,7 @@ commands =
python scripts/eachdist.py lint --check-only
[testenv:docker-tests]
-basepython: python3.9
+basepython: python3.10
deps =
pip >= 20.3.3
pytest
