Resolve collection issue

Author: joelambert

composer.json

@@ -4,7 +4,7 @@
         "php": ">=7.1.3",
         "symfony/finder": "^4.2.5|^5.0",
         "twig/twig": "^2.6",
-        "tightenco/collect": "^5.7.0",
+        "tightenco/collect": "^5.6.0",
         "league/commonmark": "^1.5",
         "mnapoli/front-yaml": "^1.6"
     },