codebeat badge

Is it fine to add codebeat badge to README? 

codebeat is automated code review tool for Swift, Ruby & Go that helps get instant feedback on code quality. 

"Quick wins" suggested by codebeat could be a nice candidate for a pull request and help other developers become contributors.

FYI. To be fully open and honest. I'm co-founder of codebeat.

README.md

@@ -23,7 +23,7 @@
 </p>
 
 Kingfisher is a lightweight and pure Swift implemented library for downloading and caching image from the web. This project is heavily inspired by the popular [SDWebImage](https://github.com/rs/SDWebImage). And it provides you a chance to use pure Swift alternative in your next app.
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+[![codebeat](https://codebeat.co/badges/30b4386d-46e5-46ee-bcc6-251158bb5ef7)](https://codebeat.co/projects/github-com-onevcat-kingfisher)
 ## Features
 
 * Everything in Kingfisher is asynchronous, not only downloading, but also caching. That means you never need to worry about blocking your UI thread.