Update workflow.

Author: tompollard

.github/workflows/run-tests.yml

@@ -20,17 +20,16 @@ jobs:
           - python-version: "3.10"
             coverage: 1
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
-        cache: 'pip'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest pyright
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        python -m pip install flake8 pyright
+        python -m pip install -e ".[dev]"
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names