github: Create publishing workflow on tag push, disable `cargo-releas…

…e` publish (#52)

In this release workflow (already employed by other Traverse Research
crates) `cargo-release` does the gruntwork and pushes a tag, but does
not publish to crates.io yet; this'll be done by the CI.

.github/workflows/publish.yaml

@@ -0,0 +1,22 @@
+name: Publish
+
+on:
+  push:
+    tags:
+    paths: "/Cargo.toml"
+
+jobs:
+  Publish:
+    if: github.repository_owner == 'Traverse-Research'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - name: Publish
+        uses: actions-rs/cargo@v1
+        with:
+          command: publish
+          args: --token ${{ secrets.cratesio_token }}

release.toml

@@ -3,6 +3,7 @@ tag-message = "Release {{version}}"
 tag-name = "{{version}}"
 sign-commit = true
 sign-tag = true
+publish = false
 
 pre-release-replacements = [
   {file="README.md", search="hassle-rs = .*", replace="{{crate_name}} = \"{{version}}\""},