Update readme

Author: joaorobertopb

README.md

@@ -1,8 +1,5 @@
 # Laravel Page Speed
 [![Project on GitScrum](https://gitscrum.com/badges/project.svg?project=gitscrum/bulls-eye-gitscrum-37)](https://gitscrum.com)
-[![Laravel 5.3][icon-l53]][link-laravel]
-[![Laravel 5.4][icon-l54]][link-laravel]
-[![Laravel 5.5][icon-l55]][link-laravel]
 [![Build Status](https://travis-ci.org/renatomarinho/laravel-page-speed.svg?branch=master)](https://travis-ci.org/renatomarinho/laravel-page-speed)
 [![License](https://poser.pugx.org/renatomarinho/laravel-page-speed/license)](https://packagist.org/packages/renatomarinho/laravel-page-speed)
 [![Latest Stable Version](https://poser.pugx.org/renatomarinho/laravel-page-speed/version)](https://packagist.org/packages/renatomarinho/laravel-page-speed)
@@ -304,6 +301,10 @@ By default this field comes configured with some options, so feel free to config
 
 *Notice*: This package skip automatically binary response. See [File Downloads][link-file-download].
 
+## Warning
+
+**\RenatoMarinho\LaravelPageSpeed\Middleware\TrimUrls::class** is considered **medium risk**. It can cause problems if it uses the wrong base URL. This can happen, for example, if you serve HTML that will be pasted verbatim into other HTML pages. If URLs are trimmed on the first page, they will be incorrect for the page they are inserted into. In this case, just disable the middleware.
+
 ## Testing
 
 ``` bash
@@ -317,6 +318,7 @@ Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
 ## Credits
 
 - [Renato Marinho][link-author]
+- [João Roberto P. Borges][link-maintainer]
 - [All Contributors][link-contributors]
 
 ## Inspiration 
@@ -327,15 +329,13 @@ Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
 
 The MIT License (MIT). Please see [License File](LICENSE.md) for more information.
 
-[icon-l53]: https://img.shields.io/badge/Laravel-5.3-brightgreen.svg?style=flat-square
-[icon-l54]: https://img.shields.io/badge/Laravel-5.4-brightgreen.svg?style=flat-square
-[icon-l55]: https://img.shields.io/badge/Laravel-5.5-brightgreen.svg?style=flat-square
 [icon-downloads]: https://poser.pugx.org/renatomarinho/laravel-page-speed/downloads
 
 [link-laravel]: https://laravel.com
 [link-downloads]: https://packagist.org/packages/renatomarinho/laravel-page-speed
 [link-before]: https://i.imgur.com/cN3MWYh.png
 [link-after]: https://i.imgur.com/IKWKLkL.png
 [link-author]: https://github.com/renatomarinho
+[link-maintainer]: https://github.com/joaorobertopb
 [link-contributors]: ../../contributors
 [link-file-download]: https://laravel.com/docs/5.5/responses#file-downloads