dependency updates

Author: codemasher

composer.json

@@ -30,10 +30,10 @@
 	},
 	"require-dev": {
 		"phan/phan": "^5.4",
-		"phpmd/phpmd": "^2.13",
+		"phpmd/phpmd": "^2.15",
 		"phpunit/phpunit": "^9.6",
 		"setasign/fpdf": "^1.8.2",
-		"squizlabs/php_codesniffer": "^3.7"
+		"squizlabs/php_codesniffer": "^3.8"
 	},
 	"suggest": {
 		"chillerlan/php-authenticator": "Yet another Google authenticator! Also creates URIs for mobile apps.",