try to fix tox

tox.ini

@@ -6,7 +6,7 @@
 ; we set the associated flag (e.g. for linting we don't need
 ; the package installation).
 [tox]
-envlist = bandit, safety, black, black-check, isort, isort-check, check-hash, check-packages, check-dependencies, flake8, mypy, pylint, darglint, check-generate-all-protocols, check-abciapp-specs, check-abci-docstrings, check-handlers, py{3.7,3.8,3.9,3.10}-{win,linux,darwin}
+envlist = bandit, safety, black, black-check, isort, isort-check, check-hash, check-packages, check-dependencies, flake8, mypy, pylint, darglint, check-generate-all-protocols, check-abciapp-specs, check-abci-docstrings, check-handlers, py{3.10}-{win,linux,darwin}
 ; when running locally we don't want to fail for no good reason
 skip_missing_interpreters = true
 isolated_build = True
@@ -78,7 +78,7 @@ deps =
 ; end-extra
 
 [testenv]
-basepython = python3
+basepython = python3.10
 whitelist_externals = /bin/sh
 deps = {[deps-packages]deps}
 passenv = *