composer: requires nette/utils beta2

Author: dg

composer.json

@@ -18,7 +18,7 @@
 		"php": ">=7.1",
 		"nette/component-model": "^3.0",
 		"nette/http": "^2.3.8 || ~3.0.0",
-		"nette/utils": "^3.0"
+		"nette/utils": "^3.0-beta2"
 	},
 	"require-dev": {
 		"nette/di": "^2.4 || ~3.0.0",