dev: update PHPUnit to >8.5

Author: justlevine

composer.json

@@ -2,6 +2,7 @@
 	"name": "axepress/wp-graphql-cs",
 	"type": "phpcodesniffer-standard",
 	"description": "PHP_CodeSniffer rules (sniffs) for the WPGraphQL ecosystem.",
+	"version": "1.0.0-beta.2",
 	"keywords": [
 		"phpcs",
 		"wpcs",
@@ -35,7 +36,7 @@
 		"php-parallel-lint/php-console-highlighter": "^1.0.0",
 		"phpcompatibility/php-compatibility": "^9",
 		"phpcsstandards/phpcsdevtools": "^1.0",
-		"phpunit/phpunit": "^4 || ^5 || ^6 || ^7"
+		"phpunit/phpunit": "^8.5 || ^9"
 	},
 	"config": {
 		"allow-plugins": {