attempt to publish to cargo via github action

.github/workflows/publish.yaml

@@ -0,0 +1,21 @@
+on:
+  push:
+    tags:
+      - v*
+
+  publish:
+    name: Publish to crates.io
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: swatinem/rust-cache@v2
+
+      - name: Publish
+      # https://doc.rust-lang.org/cargo/reference/config.html?highlight=CARGO_REGISTRY_TOKEN#credentials
+        run: >
+          cargo publish
+          --verbose
+          --locked
+          --token ${{ secrets.CARGO_PUBLISH_TOKEN }}