Separete legacy tests to run in legacy container

Author: stub42

.github/workflows/main.yml

@@ -3,12 +3,13 @@ name: Tests
 on: [push, pull_request, workflow_dispatch]
 
 jobs:
-  build:
+  latest:
+    name: Latest Python Stable Release
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.11"]
 
     steps:
       - uses: actions/checkout@v3
@@ -32,7 +33,36 @@ jobs:
           cd build/dist/pytz/tests
           python test_docs.py -vv
       - name: zdump Tests
-        if: ${{ matrix.python-version == '3.11' }}
         run: |
           python gen_tests.py
           python test_zdump.py -vv
+
+  legacy:
+    name: Older Python Releases
+    runs-on: ubuntu-20.04
+
+    strategy:
+      matrix:
+        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10"]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip wheel flake8
+      - name: Build
+        run: |
+          make build
+      - name: Unit Tests
+        run: |
+          cd build/dist/pytz/tests
+          python test_lazy.py -vv
+          python test_tzinfo.py -vv
+      - name: Documentation Tests
+        run: |
+          cd build/dist/pytz/tests
+          python test_docs.py -vv