Create publish.yml GHA (#5)

Author: n-eq

.github/workflows/publish.yml

@@ -0,0 +1,24 @@
+on:  
+  workflow_dispatch:
+    inputs:
+      dry-run:
+        description: 'If true, run with --dry-run'
+        required: false
+        default: false
+        type: boolean
+
+jobs:
+  main:
+    name: Publish a new version to crates.io
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+            toolchain: stable
+            override: true
+      - uses: katyo/publish-crates@v2
+        with:
+            registry-token: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+            dry-run: ${{ inputs.dry-run }}