Create testing workflows

.github/workflows/test-python-3.0.yml

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+name: Test Python 3.0-3.5
+
+on:
+  push:
+    branches: [ dev ]
+  pull_request:
+    branches: [ dev ]
+
+jobs:
+  test:
+
+    runs-on: [windows-latest]
+    strategy:
+      matrix:
+        python-version: [3.0.1, 3.2, 3.3, 3.4, 3.5]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Test with unittest
+      run: |
+        python -m unittest

.github/workflows/test-python-3.5.yml

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+name: Test Python 3.5-3.6
+
+on:
+  push:
+    branches: [ dev ]
+  pull_request:
+    branches: [ dev ]
+
+jobs:
+  test:
+
+    runs-on: [ubuntu-latest]
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Test with unittest
+      run: |
+        python -m unittest

.github/workflows/test-python-3.7.yml

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+name: Test Python 3.7-3.9
+
+on:
+  push:
+    branches: [ dev ]
+  pull_request:
+    branches: [ dev ]
+
+jobs:
+  test:
+
+    runs-on: [ubuntu-latest]
+    strategy:
+      matrix:
+        python-version: [3.7, 3.8, 3.9]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Test with unittest
+      run: |
+        python -m unittest

pyproject.toml

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+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel"
+]
+build-backend = "setuptools.build_meta"