Add Amaro Challenge

Author: joviane

README.md

@@ -14,6 +14,7 @@ Feel free to contribute! Only open-source challenges please!
 | :canada: | [AlayaCare - 1](https://www.alayacare.com/) | Python, Flask, SQLite | [Code →](https://github.com/AlayaCare/backend-python-test)
 | :canada: | [AlayaCare - 2](https://www.alayacare.com/) | PHP, Silex, MySQL | [Code →](https://github.com/AlayaCare/backend-php-test)
 | :fr: | [AirCall](https://aircall.io/) | Ruby & Rails | [Code →](https://github.com/aircall/backend-test-5)
+| :brazil: | [Amaro](https://amaro.com/) | PHP | [Code →](https://github.com/amarofashion/back-end-challenge)
 | :us: | [Ambulnz](http://www.ambulnz.com/) | (Node.js or Ruby) & Any Framework | [Code →](https://github.com/AmbulnzLLC/fullstack-challenge/tree/master/backend)
 | :brazil: | [B2W](https://ri.b2w.digital/) | Java or Elixir | [Code →](https://github.com/b2w-marketplace/challenge-backend)
 | :brazil: | [Bossabox](https://bossabox.com/para-profissionais) | Any Language & Any Framework & Web API | [Code →](https://www.notion.so/Back-end-0b2c45f1a00e4a849eefe3b1d57f23c6)