Add Support for PATCH method

For now implementation is done in Prefixes only, more to come.

src/Api/IPAM/Prefixes.php

@@ -39,6 +39,17 @@ class Prefixes extends AbstractApi
         return $this->put("/ipam/prefixes/" . $id . "/", $params);
     }
 
+    /**
+     * @param int $id
+     * @param array $params
+     * @return array
+     * @throws GuzzleException
+     */
+    public function update(int $id, array $params = []): array
+    {
+        return $this->patch("/ipam/prefixes/" . $id . "/", $params);
+    }
+
     /**
      * @param array $params
      * @return mixed