implement automatic publishing of crate when a tagged commit is pushed.

.github/workflows/publish.yml

@@ -0,0 +1,56 @@
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  test:
+    name: Build and Test Project
+    runs-on: ubuntu-latest
+
+    env:
+      CARGO_TERM_COLORS: always
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: rustfmt, clippy
+
+      - name: Setup Cargo Cache
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db
+            target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
+      - name: Setup Protobuf Compiler
+        uses: arduino/setup-protoc@v2
+
+      - name: Run Unit Tests
+        run: cargo test
+
+  publish:
+    name: Publish crate to crates.io
+    needs: test
+    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 }}