fix [CoreBundle] composer dependencies

Author: Franz Wilding

composer.json

@@ -42,11 +42,9 @@
         "ext-ctype": "*",
         "ext-iconv": "*",
         "ext-json": "*",
-        "symfony/console": "5.0.*",
-        "symfony/dotenv": "5.0.*",
         "symfony/flex": "^1.6",
-        "symfony/framework-bundle": "5.0.*",
-        "symfony/yaml": "5.0.*",
+        "symfony/dotenv": "^5.0|^4.3",
+        "symfony/yaml": "^5.0|^4.3",
         "unite-cms/core-bundle": "dev-master",
         "unite-cms/doctrine-orm-bundle": "dev-master",
         "unite-cms/admin-bundle": "dev-master",