Avoid deprecation from dev dependency

Author: Jean85

composer.json

@@ -41,7 +41,7 @@
         "symfony/browser-kit": "^2.8||^3.0||^4.0",
         "symfony/expression-language": "^2.8||^3.0||^4.0",
         "symfony/framework-bundle": "^2.8||^3.0||^4.0",
-        "symfony/monolog-bundle": "^3.0",
+        "symfony/monolog-bundle": "^3.0.1",
         "symfony/phpunit-bridge": "^5.0",
         "symfony/yaml": "^2.8||^3.0||^4.0"
     },