Adds Publish action (#7)

.github/workflows/publish.yml

@@ -0,0 +1,22 @@
+name: Publish
+
+on:
+  push:
+    tags: "[1-9]+.[0-9]+.[0-9]+"
+
+jobs:
+  ci:
+    strategy:
+      fail-fast: true
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+      - name: Run image
+        uses: abatilo/[email protected]
+        with:
+          poetry-version: 1.0.10
+      - name: Publish package
+        run: poetry build && poetry publish -u ${{ secrets.PYPI_USERNAME }} -p ${{ secrets.PYPI_PASSWORD }}