Auto merge of #311 - dario23:crates-io-publish, r=JohnTitor

Add publish job for crates.io

Triggered by tag push or manually from the actions interface.

fixes #300

Author: bors

.github/workflows/publish.yml

@@ -0,0 +1,21 @@
+name: Publish to crates.io
+
+on:
+  push:
+    tags:
+      - '*'
+  # this is the "entry point" for manually running a workflow
+  workflow_dispatch:
+
+jobs:
+  publish:
+    name: Publish to crates.io
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: publish
+        run: cargo publish --token "${CRATES_IO_TOKEN}"
+        env:
+          CRATES_IO_TOKEN: ${{ secrets.CRATES_IO_TOKEN }}