Updated phpunit to 9.5.2

Author: mullen2

composer.json

@@ -11,7 +11,7 @@
 		"ext-openssl" : "*"
 	},
 	"require-dev" : {
-		"phpunit/phpunit" : "8.5.14",
+		"phpunit/phpunit" : "9.5.2",
 		"squizlabs/php_codesniffer" : "3.5.8",
 		"apigen/apigen" : "v4.1.2",
 		"erusev/parsedown" : "1.6.2",