Removed tests for Python versions <3.12 (because numpy version that comes bundled with 3.12 isn't backward-compatible)

Author: chriscarrollsmith

.github/workflows/main.yml

@@ -10,11 +10,11 @@ jobs:
   flake8_py3:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
       with:
-        python-version: 3.8
+        python-version: 3.12
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -32,11 +32,11 @@ jobs:
     needs: [flake8_py3]
     strategy:
       matrix:
-        python: [3.8, 3.9, '3.10']
+        python: [3.12]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
     - name: Install dependencies