Update PHP 8 stubs

Author: ondrejmirtes

composer.json

@@ -25,7 +25,7 @@
 		"ondram/ci-detector": "^3.4.0",
 		"ondrejmirtes/better-reflection": "4.3.35",
 		"phpdocumentor/reflection-docblock": "4.3.4",
-		"phpstan/php-8-stubs": "^0.1.3",
+		"phpstan/php-8-stubs": "^0.1.4",
 		"phpstan/phpdoc-parser": "^0.4.9",
 		"react/child-process": "^0.6.1",
 		"react/event-loop": "^1.1",