Try to support 3.7

Author: fealho

.github/workflows/deprecated-python.yml

@@ -16,6 +16,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - python-version: '3.7'
+            os: ubuntu-22.04
           - python-version: '3.8'
             os: ubuntu-latest
 
@@ -39,7 +41,14 @@ jobs:
           grep -n "requires-python" pyproject.toml
 
       - name: Install package and test dependencies
-        run: python -m pip install invoke .[test]
+        run: python -m pip install --no-deps invoke .[test]
+    
+      - name: Try to install any 3.7-compatible dependency versions
+        run: |
+            # Let pip pick the newest release that still supports th epython version
+            python -m pip install \
+            numpy pandas pyarrow graphviz tqdm platformdirs pyyaml boto3 botocore cloudpickle \
+            rdt sdmetrics copulas ctgan deepecho
 
       - name: Run unit tests
         run: invoke unit