Add installation

README.md

@@ -18,6 +18,12 @@ library.
 
 ## Okay, how do I use it?
 
+Install it with [composer](https://getcomposer.org/):
+
+```sh
+$ composer require toalett/multiprocessing
+```
+
 ### Structure
 
 The library provides a single class to manage multiprocessing: the [`Context`](src/Context.php). It

src/Task/Task.php

@@ -11,7 +11,7 @@ abstract class Task
     public array $arguments;
     protected ?TimerInterface $timer = null;
 
-    public function __construct(callable $callable, ...$arguments)
+    public function __construct(callable $callable, array $arguments)
     {
         $this->callable = $callable;
         $this->arguments = $arguments;