add: php composer management

vendor/composer/installers/src/Composer/Installers/RoundcubeInstaller.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Composer\Installers;
+
+class RoundcubeInstaller extends BaseInstaller
+{
+    /** @var array<string, string> */
+    protected $locations = array(
+        'plugin' => 'plugins/{$name}/',
+    );
+
+    /**
+     * Lowercase name and changes the name to a underscores
+     */
+    public function inflectPackageVars(array $vars): array
+    {
+        $vars['name'] = strtolower(str_replace('-', '_', $vars['name']));
+
+        return $vars;
+    }
+}