Bumped version

Author: GrahamCampbell

README.md

@@ -21,7 +21,7 @@ Laravel HTMLMin was created by, and is maintained by [Graham Campbell](https://g
 To get the latest version of Laravel HTMLMin, simply add the following line to the require block of your `composer.json` file:
 
 ```
-"graham-campbell/htmlmin": "~3.0"
+"graham-campbell/htmlmin": "~3.1"
 ```
 
 You'll then need to run `composer install` or `composer update` to download it and have the autoloader updated.