MQE-1174: Deliver weekly regression enablement tests

- Try MFTF 2.3.x-dev

Author: tomreece

composer.json

@@ -81,7 +81,7 @@
         "zendframework/zend-view": "~2.10.0"
     },
     "require-dev": {
-        "magento/magento2-functional-testing-framework": "2.3.4",
+        "magento/magento2-functional-testing-framework": "2.3.x-dev",
         "friendsofphp/php-cs-fixer": "~2.12.0",
         "lusitanian/oauth": "~0.8.10",
         "pdepend/pdepend": "2.5.2",