chore: add a release workflow

Author: Midnighter

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: CI/CD
+name: CI
 
 on:
   push:

.github/workflows/release.yml

@@ -0,0 +1,55 @@
+name: CD
+
+on:
+  push:
+    tags:
+      - '[0-9].[0-9].[0-9]'
+      - '[0-9]+.[0-9]+.[0-9]+rc[0-9]+'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        python-version: [3.8]
+
+    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: |
+          python -m pip install --upgrade pip setuptools wheel
+          python -m pip install tox tox-gh-actions twine
+      - name: Test with tox
+        run: tox
+        env:
+          STRUCTURIZR_WORKSPACE_ID: ${{ secrets.STRUCTURIZR_WORKSPACE_ID }}
+          STRUCTURIZR_API_KEY: ${{ secrets.STRUCTURIZR_API_KEY }}
+          STRUCTURIZR_API_SECRET: ${{ secrets.STRUCTURIZR_API_SECRET }}
+      - name: Build package
+        run: python setup.py sdist bdist_wheel
+      - name: Check the package
+        run: twine check dist/*
+      - name: Publish to PyPI
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        run:
+          twine upload --skip-existing --non-interactive dist/*
+      - name: Create GitHub release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          body: >
+            Please see
+            https://github.com/${{ github.repository }}/blob/${GITHUB_REF#refs/heads/}/CHANGELOG.rst
+            for the full release notes.
+          draft: false
+          prerelease: false