Note about minimal requirements added to readme

README.md

@@ -6,7 +6,7 @@
 [![Code Coverage](https://scrutinizer-ci.com/g/EvilFreelancer/routeros-api-php/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/EvilFreelancer/routeros-api-php/?branch=master)
 [![Scrutinizer CQ](https://scrutinizer-ci.com/g/evilfreelancer/routeros-api-php/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/evilfreelancer/routeros-api-php/)
 
-# RouterOS PHP7 API Client
+# RouterOS API Client
 
     composer require evilfreelancer/routeros-api-php
 
@@ -17,6 +17,11 @@ to work with PHP7 in accordance with the PSR standards.
 You can use this library with pre-6.43 and post-6.43 versions of
 RouterOS firmware, it will be detected automatically on connection stage.
 
+## Minimum requirements
+
+* `php` >= 7.2
+* `ext-sockets`
+
 ## Laravel framework support
 
 RouterOS API client is optimized for usage as normal Laravel package, all functional is available via `\RouterOS` facade,