Add a workflow to keep meta-package versions in sync

.gitattributes

@@ -0,0 +1,2 @@
+# Exclude for archive generation
+/.git* export-ignore

.github/workflows/versions.yaml

@@ -0,0 +1,89 @@
+name: Versions
+
+on:
+  workflow_dispatch:
+    inputs:
+      dry-run:
+        required: true
+        type: boolean
+        default: true
+  # schedule:
+  #   - cron: '*/10 * * * *'
+
+jobs:
+  sync:
+    name: Sync
+    runs-on: ubuntu-latest
+    outputs:
+      tags-matrix: steps.tags-matrix.outputs.result
+      latest-release: steps.latest-release.outputs.result
+    steps:
+      - name: Get upstream package name
+        id: package
+        run: echo "::set-output name=package-name::$(jq -r '.require | map_values(select(. == "self.version")) | keys[0]' composer.json)"
+
+      - name: Generate diff of versions arrays
+        id: tags-matrix
+        uses: actions/github-script@v6
+        env:
+          PACKAGE: ${{ steps.package.outputs.package-name }}
+        with:
+          script: |
+            const { PACKAGE } = process.env
+            const currrentTags = github.rest.repos.listTags({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+            })
+            const upstreamTags = github.rest.repos.listTags({
+              owner: context.repo.owner,
+              repo: PACKAGE.substring(str.indexOf('/') + 1),
+              per_page: 15
+            })
+            return upstreamTags.filter((tag) => !currrentTags.includes(tag))
+
+      - name: Extract latest release
+        id: latest-release
+        env:
+          TAGS: ${{ steps.tags-matrix.outputs.result }}
+        run: echo "::set-output name=result::$(jq -r '.[0]' <<< "$TAGS")"
+
+  tags:
+    name: Tags
+    runs-on: ubuntu-latest
+    needs:
+      - sync
+    if: needs.sync.outputs.tags-matrix
+    strategy:
+      fail-fast: false
+      matrix:
+        tag: ${{ fromJSON(needs.sync.outputs.tags-matrix) }}
+    steps:
+      - name: Create a tag
+        uses: rickstaa/action-create-tag@v1
+        if: ${{ ! inputs.dry-run }}
+        with:
+          tag: ${{ matrix.tag }}
+          message: ${{ matrix.tag }}
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    needs:
+      - sync
+      - tags
+    if: needs.sync.outputs.latest-release
+    steps:
+      - name: Generate token
+        uses: tibdex/github-app-token@v1
+        id: generate-token
+        with:
+          app_id: ${{ secrets.BOT_APP_ID }}
+          private_key: ${{ secrets.BOT_PRIVATE_KEY }}
+
+      - name: Create a release
+        uses: softprops/action-gh-release@v1
+        if: ${{ ! inputs.dry-run }}
+        with:
+          token: ${{ steps.generate-token.outputs.token }}
+          body: Version ${{ needs.sync.outputs.latest-release }}
+          tag_name: ${{ needs.sync.outputs.latest-release }}