Expand test matrix

Author: mwcraig

.github/workflows/run_tests.yml

@@ -14,14 +14,16 @@ jobs:
         strategy:
           fail-fast: true
           matrix:
-            os: [ubuntu-latest]
+            python-version: ["3.12", "3.13"]
+            os: [ubuntu-latest, macOS-latest, windows-latest]
         steps:
         - name: Checkout code
           uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
-        - name: Set up Python
+        - name: Set up Python ${{ matrix.python-version }}
           uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55  # v5.5.0
           with:
-            python-version: '3.13'
+            python-version: ${{ matrix.python-version }}
+            cache: 'pip'
         - name: Install and build
           run: python -m pip install .[test]
         - name: Run tests

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
   hooks:
     # Run the linter.
     - id: ruff
-      args: [--fix]
+      args: [--fix, --show-fixes]
 
 -   repo: https://github.com/psf/black
     rev: 25.1.0