Move create-project from travis to gha

Author: nicolas-grekas

.github/workflows/create-project.yml

@@ -0,0 +1,51 @@
+name: Q&A
+
+on:
+    pull_request:
+
+defaults:
+    run:
+        shell: bash
+
+jobs:
+
+    create-project:
+        name: Create-project
+        runs-on: Ubuntu-20.04
+
+        steps:
+            -
+                name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    coverage: "none"
+                    php-version: "7.4"
+
+            -
+                name: Export configuration
+                continue-on-error: true
+                id: config
+                run: |
+                    SYMFONY_ENDPOINT=https://symfony.sh/r/github.com/symfony/recipes/${{ github.event.number }}
+                    echo SYMFONY_ENDPOINT=$SYMFONY_ENDPOINT >> $GITHUB_ENV
+
+                    PACKAGES=$(curl -s $SYMFONY_ENDPOINT | sed -En 's/.*composer req "([^"]+)".*/\1/p')
+                    echo PACKAGES=$PACKAGES >> $GITHUB_ENV
+
+                    [[ "" != "$PACKAGES" ]]
+
+            -
+                name: Create-project with skeleton ^4
+                if: "always() && steps.config.outcome == 'success'"
+                run: |
+                    composer create-project "symfony/skeleton:^4" v4
+                    cd v4
+                    composer require $PACKAGES
+
+            -
+                name: Create-project with skeleton ^5
+                if: "always() && steps.config.outcome == 'success'"
+                run: |
+                    composer create-project "symfony/skeleton:^5" v5
+                    cd v5
+                    composer require $PACKAGES