build: Change releasing steps

Related to femiwiki/femiwiki#200
(copied from https://github.com/femiwiki/.github/blob/242bbdb0/workflow-templates/extension-release.yml)

.github/workflows/release-and-submit.yml

@@ -0,0 +1,62 @@
+on:
+  push:
+    tags:
+    - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+
+name: Upload Release Asset and submit a PR to docker-mediawiki repository
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup PHP
+        uses: shivammathur/[email protected]
+        with:
+          php-version: '7.3'
+          tools: composer:v1
+      - name: Set tag name
+        id: tag_name
+        run: echo "::set-output name=tag_name::$(basename ${{ github.ref }})"
+      - name: Build project
+        run: |
+          composer update --no-dev
+          yarn --prod
+          tar --exclude-vcs -C .. -zcvf "../${{ steps.tag_name.outputs.tag_name }}.tar.gz" "$(basename "$(pwd)")"
+          mv ../${{ steps.tag_name.outputs.tag_name }}.tar.gz ./
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          draft: false
+          prerelease: false
+      - name: Upload Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./${{ steps.tag_name.outputs.tag_name }}.tar.gz
+          asset_name: ${{ steps.tag_name.outputs.tag_name }}.tar.gz
+          asset_content_type: application/zip
+      - name: Submit a PR
+        run: |
+          curl \
+            --fail \
+            --request POST \
+            --url https://api.github.com/repos/femiwiki/docker-mediawiki/dispatches \
+            --header "Authorization: token ${{ secrets.BOT_TOKEN }}" \
+            --header 'content-type: application/json' \
+            --data '{
+              "event_type": "bump-extension",
+              "client_payload": {
+                "extension": "${{ github.event.repository.name }}",
+                "version": "${{ steps.tag_name.outputs.tag_name }}"
+              }
+            }'