Update README

Author: jspringe

README.md

@@ -1,6 +1,8 @@
 # Wmi-Scripting
 <p align="center">
 <a href="https://travis-ci.org/phpwintools/wmi-scripting"><img src="https://travis-ci.org/phpwintools/wmi-scripting.svg" alt="Build Status"></a>
+<img src="https://scrutinizer-ci.com/g/phpwintools/wmi-scripting/badges/coverage.png?b=master" alt="Code Coverage">
+<img src="https://scrutinizer-ci.com/g/phpwintools/wmi-scripting/badges/quality-score.png?b=master" alt="Scrutinizer">
 <a href="https://packagist.org/packages/phpwintools/wmi-scripting"><img src="https://poser.pugx.org/phpwintools/wmi-scripting/v/stable.svg" alt="Latest Stable Version"></a>
 <a href="https://packagist.org/packages/phpwintools/wmi-scripting"><img src="https://poser.pugx.org/phpwintools/wmi-scripting/v/unstable.svg" alt="Latest Unstable Version"></a>
 <a href="https://packagist.org/packages/phpwintools/wmi-scripting"><img src="https://img.shields.io/github/license/phpwintools/wmi-scripting" alt="License"></a>

src/WmiScripting/Collections/ModelCollection.php

@@ -16,7 +16,7 @@ class ModelCollection extends Collection
 {
     /**
      * @param callable|null $callback
-     * @param null          $default
+     * @param null|mixed    $default
      *
      * @return  Win32Model
      */