Add workflow that tests against pip packages for various Python versions

.github/workflows/test-with-pip.yml

@@ -0,0 +1,31 @@
+name: Test with pip
+
+on:
+- pull_request
+- workflow_dispatch
+
+jobs:
+  tests:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ['3.6', '3.8', '3.10']
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Get apptools source
+      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 and local packages
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install .[h5,preferences]
+    - name: Run tests
+      run: |
+        mkdir testdir
+        cd testdir
+        python -m unittest discover -v apptools

pyproject.toml

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+[build-system]
+requires = ['setuptools', 'wheel']
+build-backend = 'setuptools.build_meta'