composer.json: Upgrade mediawiki/mediawiki-phan-config to 0.12.0

Author: reedy

composer.json

@@ -22,7 +22,7 @@
 		"php": ">=7.4.0"
 	},
 	"require-dev": {
-		"mediawiki/mediawiki-phan-config": "0.10.6",
+		"mediawiki/mediawiki-phan-config": "0.12.0",
 		"php-parallel-lint/php-parallel-lint": "^1.3.0",
 		"phpunit/phpunit": "^9.5",
 		"squizlabs/php_codesniffer": "^3.6.0"