🔧 fix license tag

Author: codemasher

composer.json

@@ -3,7 +3,7 @@
 	"name": "codemasher/php-ext-xz",
 	"description": "A PHP Extension providing xz (LZMA2) compression/decompression via PHP streams.",
 	"keywords": ["php-extension", "xz", "lzma2"],
-	"license": "The PHP License",
+	"license": "PHP-3.0",
 	"type": "php-ext",
 	"php-ext": {
 		"extension-name": "xz",