ISSUE-105: Updated versions from 3.0 to 3.1

Author: raymondschouten

README.md

@@ -4,15 +4,15 @@
 [![Total Downloads](https://poser.pugx.org/darkwebdesign/symfony-addon-constraints/downloads?format=flat)](https://packagist.org/packages/darkwebdesign/symfony-addon-constraints)
 [![License](https://poser.pugx.org/darkwebdesign/symfony-addon-constraints/license?format=flat)](https://packagist.org/packages/darkwebdesign/symfony-addon-constraints)
 
-[![Build Status](https://travis-ci.org/darkwebdesign/symfony-addon-constraints.svg?branch=3.0)](https://travis-ci.org/darkwebdesign/symfony-addon-constraints?branch=3.0)
-[![Coverage Status](https://codecov.io/gh/darkwebdesign/symfony-addon-constraints/branch/3.0/graph/badge.svg)](https://codecov.io/gh/darkwebdesign/symfony-addon-constraints)
+[![Build Status](https://travis-ci.org/darkwebdesign/symfony-addon-constraints.svg?branch=3.1)](https://travis-ci.org/darkwebdesign/symfony-addon-constraints?branch=3.1)
+[![Coverage Status](https://codecov.io/gh/darkwebdesign/symfony-addon-constraints/branch/3.1/graph/badge.svg)](https://codecov.io/gh/darkwebdesign/symfony-addon-constraints)
 [![PHP Version](https://img.shields.io/badge/php-5.5%2B-777BB3.svg)](https://php.net/)
-[![Symfony Version](https://img.shields.io/badge/symfony-3.0-93C74B.svg)](https://symfony.com/)
+[![Symfony Version](https://img.shields.io/badge/symfony-3.1-93C74B.svg)](https://symfony.com/)
 
 Symfony Add-on Constraints is a collection of extra Symfony validation constraints that you can use in your Symfony
 applications.
 
-Learn more about it in its [documentation](https://github.com/darkwebdesign/symfony-addon-pack/blob/3.0/doc/reference/constraints/index.md).
+Learn more about it in its [documentation](https://github.com/darkwebdesign/symfony-addon-pack/blob/3.1/doc/reference/constraints/index.md).
 
 ## Features
 

composer.json

@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/validator": "3.0.*"
+        "symfony/validator": "3.1.*"
     },
     "require-dev": {
         "codeclimate/php-test-reporter": "^0.3.2",