Speed up CI workflow (#42)

.github/workflows/test_latest_versions.yml

@@ -37,6 +37,4 @@ jobs:
       - name: Test using tox environment
         shell: bash
         run: |
-          toxpyversion=$(echo ${{ matrix.python-version }} | sed -E 's/^([0-9]+)\.([0-9]+).*$/\1\2/')
-          tox -epy${toxpyversion}
-          tox -epy${toxpyversion}-notebook
+          tox -e py,notebook --parallel --parallel-no-spinner

tox.ini

@@ -4,6 +4,9 @@ envlist = py{310,311,312}{,-notebook}, lint, coverage, docs
 isolated_build = True
 
 [testenv]
+package = wheel
+wheel_build_env = .pkg
+parallel_show_output = True
 extras =
   test
 commands =