Add authors to README

README.md

@@ -559,5 +559,10 @@ to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of
 ## Credits
 The icon was created by [Simon Child from Noun Project](https://thenounproject.com/term/salvador-dali/124566/) and is published under [Creative Commons License](https://creativecommons.org/licenses/by/3.0/us/)
 
+## Authors
+Created by [Nikita Esaulov](https://github.com/nesaulov) with help from [Alessandro Minali](https://github.com/AlessandroMinali) and [Alexey Bespalov](https://github.com/nulldef)
+
+![Supported by Umbrellio](https://umbrellio.github.io/Umbrellio/supported_by_umbrellio.png)
+
 ## License
 The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).