Update the search_api_solr version to 4

Author: mcortes19

generators/app/templates/deploy-environment/Platformsh/composer.json

@@ -21,7 +21,7 @@
     "drupal/core-recommended": "<%= coreVersion %>",
     "cweagans/composer-patches": "^1.6.5",
     "drupal/redis": "^1.4",
-    "drupal/search_api_solr": "^3.9",
+    "drupal/search_api_solr": "^4.0",
     "drush/drush": "^9.7.1 | ^10.0.0",
     "platformsh/config-reader": "^2.3",
     "symfony/event-dispatcher": "4.3.4 as 3.4.35"