added version check

.github/workflows/actions_version_check.yaml

@@ -0,0 +1,26 @@
+name: Run unittests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  python35:
+    runs-on: ubuntu-latest  # Replace with desired runner
+    steps:
+      - uses: actions/checkout@v3
+      - uses: docker/run-action@v3
+        with:
+          name: python:3.5-slim
+          commands: |
+            python -m unittest discover tests
+
+  python36:
+    runs-on: ubuntu-latest  # Replace with desired runner
+    steps:
+      - uses: actions/checkout@v3
+      - uses: docker/run-action@v3
+        with:
+          name: python:3.6-slim
+          commands: |
+            python -m unittest discover tests