Allow Symfony 5.0

Author: nicolas-grekas

composer.json

@@ -19,11 +19,11 @@
         "php": "^7.1.3"
     },
     "require-dev": {
-        "symfony/config": "~4.2",
-        "symfony/http-foundation": "~3.4|~4.0",
-        "symfony/yaml": "~3.4|~4.0",
-        "symfony/expression-language": "~3.4|~4.0",
-        "symfony/dependency-injection": "~3.4|~4.0",
+        "symfony/config": "^4.2|^5.0",
+        "symfony/http-foundation": "^3.4|^4.0|^5.0",
+        "symfony/yaml": "^3.4|^4.0|^5.0",
+        "symfony/expression-language": "^3.4|^4.0|^5.0",
+        "symfony/dependency-injection": "^3.4|^4.0|^5.0",
         "doctrine/annotations": "~1.2",
         "psr/log": "~1.0"
     },