Allow Symfony 5.0

Author: nicolas-grekas

composer.json

@@ -18,14 +18,14 @@
     "require": {
         "php": "^7.1.3",
         "ext-xml": "*",
-        "symfony/http-kernel": "~3.4|~4.0",
-        "symfony/twig-bridge": "~3.4|~4.0",
-        "symfony/var-dumper": "^4.1.1"
+        "symfony/http-kernel": "^3.4|^4.0|^5.0",
+        "symfony/twig-bridge": "^3.4|^4.0|^5.0",
+        "symfony/var-dumper": "^4.1.1|^5.0"
     },
     "require-dev": {
-        "symfony/config": "~4.2",
-        "symfony/dependency-injection": "~3.4|~4.0",
-        "symfony/web-profiler-bundle": "~3.4|~4.0"
+        "symfony/config": "^4.2|^5.0",
+        "symfony/dependency-injection": "^3.4|^4.0|^5.0",
+        "symfony/web-profiler-bundle": "^3.4|^4.0|^5.0"
     },
     "conflict": {
         "symfony/config": "<4.2",