add publish action (#12)

.github/workflows/publish.yaml

@@ -0,0 +1,35 @@
+name: Publish Package to Crates.io
+
+on:
+  release:
+    types: [published]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - run: cargo build --verbose
+    - run: cargo test --verbose
+      env:
+        PDL_API_KEY: ${{secrets.PDL_API_KEY}}
+
+  publish-crate-io:
+    needs: test
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    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 }}