Add support for Symfony/YAML 4.4 (#61)

* Add support for Symfony/YAML 4.4

Co-authored-by: Piero Recchia <[email protected]>
Co-authored-by: Carsten Brandt <[email protected]>

Author: 3 people

composer.json

@@ -20,7 +20,7 @@
 	"require": {
 		"php": ">=7.1.0",
 		"ext-json": "*",
-		"symfony/yaml": "^3.0 | ~4.0.0 | ~4.1.0 | ~4.2.0 | ~4.3.0 | ^5.0",
+		"symfony/yaml": "^3.0 | ^4.0 | ^5.0",
 		"justinrainbow/json-schema": "^5.0"
 	},
 	"require-dev": {