Allow later versions of symfony packages (#111)

Author: brianwozeniak

composer.json

@@ -16,9 +16,9 @@
     ],
     "require": {
         "php": ">=7.0.0",
-        "symfony/config": "^2.3|^3.0|^4.0",
-        "symfony/translation": "^2.3|^3.0|^4.0",
-        "symfony/yaml": "^2.3|^3.0|^4.0",
+        "symfony/config": "^2.3|^3.0|^4",
+        "symfony/translation": "^2.3|^3.0|^4",
+        "symfony/yaml": "^2.3|^3.0|^4",
         "friendsofphp/php-cs-fixer": "^2.14"
     },
     "require-dev": {