Add logic to do automated Github releases (#21)

Add logic to create a new automated GH release whenever the version in
package.json is bumped and merged into mainline.

.github/workflows/release.yaml

@@ -1,27 +1,61 @@
 name: Version 🔖
 
 on:
-  release:
-    types: [created]
+  push:
+    branches:
+      - main
+    paths:
+      - 'package.json'
 
 concurrency: ${{ github.workflow }}-${{ github.ref }}
 
 jobs:
-  version:
-    name: Release
+  release:
     runs-on: ubuntu-latest
     environment: release
     permissions:
-      contents: read
+      contents: write
       id-token: write
+
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Get version from package.json
+      id: package_version
+      run: echo "VERSION=$(node -p "require('./package.json').version")" >> $GITHUB_OUTPUT
+
+    - name: Check if tag exists
+      id: check_tag
+      run: |
+        git fetch --tags
+        if git rev-parse "v${{ steps.package_version.outputs.VERSION }}" >/dev/null 2>&1; then
+          echo "::set-output name=EXISTS::true"
+        fi
+
+    - name: Create Release
+      if: steps.check_tag.outputs.EXISTS != 'true'
+      uses: softprops/action-gh-release@v2
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        tag_name: v${{ steps.package_version.outputs.VERSION }}
+        name: Release v${{ steps.package_version.outputs.VERSION }}
+        draft: false
+        prerelease: false
+        generate_release_notes: true
+        make_latest: true
+
+    - name: Setup node
+      uses: actions/setup-node@v4
+      with:
           node-version: "20.x"
           registry-url: "https://registry.npmjs.org"
-      - run: npm install -g npm@^9.5.0
-      - run: npm ci
-      - run: npm publish --provenance --access public
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+    - name: Publish to NPM
+      run: |
+        npm install -g npm@^9.5.0
+        npm ci
+        npm publish --provenance --access public
+      env:
+        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@coinbase/staking-client-library-ts",
-  "version": "0.6.0",
+  "version": "0.7.0",
   "description": "Coinbase Staking API Typescript Library",
   "repository": "https://github.com/coinbase/staking-client-library-ts.git",
   "license": "Apache-2.0",