add release workflow

Author: braingram

.github/workflows/release.yml

@@ -0,0 +1,14 @@
+name: release
+
+on:
+  release:
+    types: [released ]
+  workflow_dispatch:
+
+jobs:
+  release:
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@v1
+    with:
+      upload_to_pypi: ${{ (github.event_name == 'release') && (github.event.action == 'released') }}
+    secrets:
+      pypi_token: ${{ secrets.PYPI_PASSWORD_ASDF_MAINTAINER }}