ci: add release workflow, remove version bump from data updates

Author: dr5hn

.github/workflows/release.yml

@@ -0,0 +1,68 @@
+name: Release
+
+on:
+  pull_request:
+    types: [closed]
+    branches: [main]
+
+jobs:
+  release:
+    name: Bump Version & Update Changelog
+    if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'data-update')
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Bump patch version
+        id: bump
+        run: |
+          OLD_VERSION=$(node -p "require('./package.json').version")
+          NEW_VERSION=$(npm version patch --no-git-tag-version)
+          echo "old_version=$OLD_VERSION" >> $GITHUB_OUTPUT
+          echo "new_version=$NEW_VERSION" >> $GITHUB_OUTPUT
+          echo "Bumped $OLD_VERSION -> $NEW_VERSION"
+
+      - name: Update CHANGELOG.md
+        env:
+          NEW_VERSION: ${{ steps.bump.outputs.new_version }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+        run: |
+          DATE=$(date +%Y-%m-%d)
+          ENTRY="## [${NEW_VERSION#v}] - $DATE\n\n### Changed\n- Updated timezone data from upstream database (PR #$PR_NUMBER)\n"
+
+          if [ -f CHANGELOG.md ]; then
+            # Insert after the first line (# Changelog header)
+            sed -i "0,/^## \[/s//$ENTRY\n## [/" CHANGELOG.md
+          else
+            printf "# Changelog\n\nAll notable changes to \`@countrystatecity/timezones\` will be documented in this file.\n\n$ENTRY" > CHANGELOG.md
+          fi
+
+      - name: Build and test
+        run: |
+          npm run build
+          npm test
+
+      - name: Commit and push
+        env:
+          NEW_VERSION: ${{ steps.bump.outputs.new_version }}
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add package.json package-lock.json CHANGELOG.md
+          git commit -m "chore: release ${NEW_VERSION}"
+          git push

.github/workflows/update-data.yml

@@ -90,21 +90,13 @@ jobs:
             echo "No data changes detected"
           fi
 
-      - name: Bump patch version
-        if: steps.check-changes.outputs.changed == 'true'
-        id: bump-version
-        run: |
-          NEW_VERSION=$(npm version patch --no-git-tag-version)
-          echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT
-          echo "Bumped version to $NEW_VERSION"
-
       - name: Create Pull Request
         if: steps.check-changes.outputs.changed == 'true'
         uses: peter-evans/create-pull-request@v6
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           commit-message: 'chore: update timezone data'
-          title: '🔄 Automated Timezone Data Update ${{ steps.bump-version.outputs.version }}'
+          title: '🔄 Automated Timezone Data Update'
           body: |
             ## Automated Timezone Data Update