added github workflow

.github/workflows/python-package.yaml

@@ -0,0 +1,44 @@
+name: CI/CD Pipeline
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    name: Test Python ${{ matrix.python-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        python-version:
+          - 3.6
+          - 3.7
+          - 3.8
+          - 3.9
+          - pypy3
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        make venv
+
+    - name: Run linter
+      run: |
+        make lint
+
+    - name: Run tests
+      run: |
+        make test