added release job

.github/workflows/main.yaml

@@ -72,3 +72,22 @@ jobs:
 
       - name: Run pytest
         run: make pytest
+
+  release:
+    name: Releasing to pypi
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Build
+        uses: abatilo/actions-poetry@v1.5.0
+        with:
+          python_version: 3.8.0
+          poetry_version: 1.0
+          working_directory: .
+          args: build
+      - name: Publish package
+        if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          user: __token__
+          password: ${{ secrets.pypi_password }}