Merge 3041a68d42 into 9ea99fccb0

README.md

 * [JSON Schema](https://github.com/jsonrainbow/json-schema) - A [JSON Schema](https://json-schema.org/) validation library.
 * [LibPhoneNumber for PHP](https://github.com/giggsey/libphonenumber-for-php) - A PHP implementation of Google's phone number handling library.
 * [MetaYaml](https://github.com/romaricdrigon/MetaYaml) - A schema validation library that supports YAML, JSON and XML.
+* [PHP Number](https://github.com/madebybob/php-number) - Deal with numbers the right way in PHP.
 * [Respect Validation](https://github.com/Respect/Validation) - A simple validation library.
 * [Symfony HTML Sanitizer](https://github.com/symfony/html-sanitizer) - An HTML sanitizer library.
 * [Upload](https://github.com/brandonsavage/Upload) - A library for handling file uploads and validation.