[11.6] Add parameters to addVariable on group level (#676)

* Add parameters to addVariable on group level

Like masked

* Explicitly only allow the supported parameters, fixed typo, fixed phpdoc notation

* Update Groups.php

Co-authored-by: Graham Campbell <GrahamCampbell@users.noreply.github.com>

Author: peterjaap

src/Api/Groups.php

@@ -396,10 +396,15 @@ public function variable($group_id, string $key)
      * @param string     $key
      * @param string     $value
      * @param bool|null  $protected
+     * @param array      $parameters {
+     *
+     *      @var string $masked         true or false
+     *      @var string $variable_type  env_var (default) or file
+     * }
      *
      * @return mixed
      */
-    public function addVariable($group_id, string $key, string $value, ?bool $protected = null)
+    public function addVariable($group_id, string $key, string $value, ?bool $protected = null, array $parameters = [])
     {
         $payload = [
             'key' => $key,
@@ -409,6 +414,14 @@ public function addVariable($group_id, string $key, string $value, ?bool $protec
         if ($protected) {
             $payload['protected'] = $protected;
         }
+        
+        if (isset($parameters['masked']) {
+             $payload['masked'] = $parameters['masked'];
+        }
+
+        if (isset($parameters['variable_type']) {
+             $payload['variable_type'] = $parameters['variable_type'];
+        }
 
         return $this->post('groups/'.self::encodePath($group_id).'/variables', $payload);
     }