Update python set up step in workflows to use latest python version (#152)

Author: frances-h

.github/workflows/dependency_checker.yml

@@ -8,10 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python 3.9
+    - name: Set up latest Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version-file: 'pyproject.toml'
     - name: Install dependencies
       run: |
         python -m pip install .[dev]

.github/workflows/integration.yml

@@ -18,9 +18,9 @@ jobs:
           - os: macos-latest
             python-version: '3.13'
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/lint.yml

@@ -9,11 +9,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.9
-      uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - name: Set up latest Python
+      uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version-file: 'pyproject.toml'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/prepare_release.yml

@@ -19,10 +19,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.10
+      - name: Set up latest Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version-file: 'pyproject.toml'
 
       - name: Install dependencies
         run: |

.github/workflows/readme.yml

@@ -13,9 +13,9 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, macos-latest]  # skip windows bc rundoc fails
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/unit.yml

@@ -18,9 +18,9 @@ jobs:
           - os: macos-latest
             python-version: '3.13'
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies