Ensure alpha branch dependencies in composer.json

composer.json

@@ -24,11 +24,11 @@
         "php": "^8.3",
         "convertim/convertim-php": "^2.0.23",
         "hybridauth/hybridauth": "^3.11",
-        "shopsys/form-types-bundle": "16.0.x-dev",
-        "shopsys/framework": "16.0.x-dev",
-        "shopsys/frontend-api": "16.0.x-dev",
-        "shopsys/migrations": "16.0.x-dev",
-        "shopsys/plugin-interface": "16.0.x-dev",
+        "shopsys/form-types-bundle": "dev-alpha as 16.0.x-dev",
+        "shopsys/framework": "dev-alpha as 16.0.x-dev",
+        "shopsys/frontend-api": "dev-alpha as 16.0.x-dev",
+        "shopsys/migrations": "dev-alpha as 16.0.x-dev",
+        "shopsys/plugin-interface": "dev-alpha as 16.0.x-dev",
         "symfony/config": "^6.4",
         "symfony/dependency-injection": "^6.4",
         "symfony/form": "^6.4",
@@ -44,7 +44,7 @@
         "phpstan/phpstan-phpunit": "^1.4.0",
         "phpstan/phpstan-symfony": "^1.4.6",
         "phpunit/phpunit": "^9.5.20",
-        "shopsys/coding-standards": "16.0.x-dev"
+        "shopsys/coding-standards": "dev-alpha as 16.0.x-dev"
     },
     "extra": {
         "symfony": {