[be] - upgrade compatibility to sf5

composer.json

@@ -12,7 +12,7 @@
     "minimum-stability": "stable",
     "require": {
         "php": ">=7.1",
-        "symfony/framework-bundle": "~4.3",
+        "symfony/framework-bundle": ">=4.3",
         "symfony/flex": "^1.2",
         "vdhicts/uptimerobot-api-client": "^1.1",
         "symfony/dependency-injection": "~4.0",