composer: phpstan bump

Author: dg

composer.json

@@ -20,7 +20,7 @@
 	"require-dev": {
 		"nette/tester": "^2.5",
 		"tracy/tracy": "^2.9",
-		"phpstan/phpstan": "^1"
+		"phpstan/phpstan": "^2"
 	},
 	"autoload": {
 		"classmap": ["src/"]