dependency updates

Author: codemasher

composer.json

@@ -31,9 +31,9 @@
 		"ext-json": "*",
 		"ext-sodium": "*",
 		"phan/phan": "^5.4",
-		"phpmd/phpmd": "^2.13",
+		"phpmd/phpmd": "^2.15",
 		"phpunit/phpunit": "^8.5 || ^9.6",
-		"squizlabs/php_codesniffer": "^3.7"
+		"squizlabs/php_codesniffer": "^3.8"
 	},
 	"suggest": {
 		"chillerlan/php-qrcode": "Create QR Codes for use with an authenticator app."