create new yaml for legacy system tests

.github/workflows/github-ci-legacy.yml

@@ -0,0 +1,34 @@
+name: Github CI Unit Testing for Legacy Environments
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    continue-on-error: true
+    strategy:
+      matrix:
+        os: [ubuntu-18.04, macos-10.15, windows-2019]
+        python-version: [2.7, 3.5, 3.6]
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      # configure python
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      # install deps
+      - name: Install dependencies for ${{ matrix.os }} Python ${{ matrix.python-version }}
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install scipy
+
+      # find and run all unit tests
+      - name: Run unit tests
+        run: python -m unittest discover test

.github/workflows/github-ci.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [2.7, 3.5, 3.6, 3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2