Add optional target project paramater to copy instance

Author: turtle0x1

CHANGELOG.md

@@ -4,6 +4,11 @@ All Notable changes to `php-lxd` will be documented in this file.
 
 Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+# [0.19.1]
+
+## Added
+  - Optional target project parameter to copy instance
+
 # [0.19.0]
 
 ## Added

src/Endpoint/InstaceBase.php

@@ -318,15 +318,23 @@ public function create($name, array $options, $wait = false, array $requestHeade
      * @param  bool   $wait Wait for operation to finish
      * @return object
      */
-    public function copy($name, $copyName, array $options = [], $wait = false)
-    {
+    public function copy(
+        $name,
+        $copyName,
+        array $options = [],
+        $wait = false,
+        string $targetProject = ""
+    ) {
         $opts = $this->getOptions($copyName, $options);
 
+        $currentProject = $this->client->getProject();
+
         $opts['source']['type'] = 'copy';
         $opts['source']['source'] = $name;
+        $opts['source']['project'] = $currentProject;
 
         $config = [
-            "project"=>$this->client->getProject()
+            "project"=>!empty($targetProject) ? $targetProject : $currentProject
         ];
 
         $response = $this->post($this->getEndpoint(), $opts, $config);