Add release workflow

Author: satterly

.github/workflows/release.yml

@@ -0,0 +1,48 @@
+name: release
+
+on:
+  push:
+    tags:
+    - 'v*'
+
+env:
+  SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Lint
+        id: lint
+        run: |
+          make pylint
+          make mypy
+      - name: Test
+        id: test
+        run: make test
+
+      - uses: act10ns/slack@v1
+        with:
+          status: ${{ job.status }}
+          steps: ${{ toJson(steps) }}
+
+  release:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        id: build
+        run: make build
+      - name: Publish to PyPI
+        id: publish
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+
+      - uses: act10ns/slack@v1
+        with:
+          status: ${{ job.status }}
+          steps: ${{ toJson(steps) }}