docs: update README.md

Author: allcontributors[bot]

README.md

@@ -1,4 +1,4 @@
-# PHP Interview Exercises · [![Build Status](https://img.shields.io/travis/com/azdanov/php-interview-exercises/master.svg?logo=travis)](https://travis-ci.com/azdanov/php-interview-exercises) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-blue.svg?logo=github)](http://makeapullrequest.com) [![Exercise Count](https://img.shields.io/endpoint.svg?url=https://php-interview-questions-counter.netlify.com/.netlify/functions/count)](./exercises) [![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors)
+# PHP Interview Exercises · [![Build Status](https://img.shields.io/travis/com/azdanov/php-interview-exercises/master.svg?logo=travis)](https://travis-ci.com/azdanov/php-interview-exercises) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-blue.svg?logo=github)](http://makeapullrequest.com) [![Exercise Count](https://img.shields.io/endpoint.svg?url=https://php-interview-questions-counter.netlify.com/.netlify/functions/count)](./exercises) [![All Contributors](https://img.shields.io/badge/all_contributors-4-orange.svg?style=flat-square)](#contributors)
 
 A number of exercises to practice whiteboard interview questions in PHP.
 
@@ -80,7 +80,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 
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-<table><tr><td align="center"><a href="https://azdanov.js.org/"><img src="https://avatars2.githubusercontent.com/u/6123841?v=4" width="100px;" alt="Anton Ždanov"/><br /><sub><b>Anton Ždanov</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/commits?author=azdanov" title="Code">💻</a> <a href="https://github.com/azdanov/php-interview-exercises/commits?author=azdanov" title="Documentation">📖</a> <a href="https://github.com/azdanov/php-interview-exercises/commits?author=azdanov" title="Tests">⚠️</a></td><td align="center"><a href="https://github.com/Ahmed-Aboud"><img src="https://avatars0.githubusercontent.com/u/25877831?v=4" width="100px;" alt="ahmed"/><br /><sub><b>ahmed</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/commits?author=Ahmed-Aboud" title="Code">💻</a> <a href="https://github.com/azdanov/php-interview-exercises/commits?author=Ahmed-Aboud" title="Tests">⚠️</a></td><td align="center"><a href="https://github.com/tizis"><img src="https://avatars1.githubusercontent.com/u/16865573?v=4" width="100px;" alt="Roman Yepanchenko"/><br /><sub><b>Roman Yepanchenko</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/issues?q=author%3Atizis" title="Bug reports">🐛</a></td></tr></table>
+<table><tr><td align="center"><a href="https://azdanov.js.org/"><img src="https://avatars2.githubusercontent.com/u/6123841?v=4" width="100px;" alt="Anton Ždanov"/><br /><sub><b>Anton Ždanov</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/commits?author=azdanov" title="Code">💻</a> <a href="https://github.com/azdanov/php-interview-exercises/commits?author=azdanov" title="Documentation">📖</a> <a href="https://github.com/azdanov/php-interview-exercises/commits?author=azdanov" title="Tests">⚠️</a></td><td align="center"><a href="https://github.com/Ahmed-Aboud"><img src="https://avatars0.githubusercontent.com/u/25877831?v=4" width="100px;" alt="ahmed"/><br /><sub><b>ahmed</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/commits?author=Ahmed-Aboud" title="Code">💻</a> <a href="https://github.com/azdanov/php-interview-exercises/commits?author=Ahmed-Aboud" title="Tests">⚠️</a></td><td align="center"><a href="https://github.com/tizis"><img src="https://avatars1.githubusercontent.com/u/16865573?v=4" width="100px;" alt="Roman Yepanchenko"/><br /><sub><b>Roman Yepanchenko</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/issues?q=author%3Atizis" title="Bug reports">🐛</a></td><td align="center"><a href="https://github.com/fathom"><img src="https://avatars3.githubusercontent.com/u/13853845?v=4" width="100px;" alt="Fathom"/><br /><sub><b>Fathom</b></sub></a><br /><a href="https://github.com/azdanov/php-interview-exercises/issues?q=author%3Afathom" title="Bug reports">🐛</a></td></tr></table>
 
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