composer: require stable packages outside of nette

Author: dg

composer.json

@@ -23,8 +23,8 @@
 		"nette/di": "^3.1 || ^4.0",
 		"latte/latte": "^2.11 || ^3.0.12",
 		"tracy/tracy": "^2.9",
-		"phpstan/phpstan": "^1.0",
-		"psr/simple-cache": "^2.0 || ^3.0"
+		"psr/simple-cache": "^2.0 || ^3.0",
+		"phpstan/phpstan-nette": "^2.0@stable"
 	},
 	"conflict": {
 		"latte/latte": ">=3.0.0 <3.0.12"