Merge pull request #8 from pavelkovar/composer_update

Allow Symfony 4 and bunny 0.3||0.4

Author: paveljanda

composer.json

@@ -24,7 +24,7 @@
 	},
 	"require": {
 		"php": ">=7.1",
-		"bunny/bunny": "^0.2.4",
-		"symfony/console": "~3.3"
+		"bunny/bunny": "^0.2.4 || ^0.3 || ^0.4",
+		"symfony/console": "~3.3 || ^4.0"
 	}
 }