Add repology badge (#613)

Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>

README.md

@@ -6,8 +6,10 @@
   <a href="#"><img src="https://img.shields.io/github/stars/ArthurSonzogni/FTXUI"></img></a>
   <a href="#"><img src="https://img.shields.io/github/forks/ArthurSonzogni/FTXUI"></img></a>
   <a href="#"><img src="https://img.shields.io/github/repo-size/ArthurSonzogni/FTXUI"></img></a>
-  <a href="https://github.com/ArthurSonzogni/FTXUI/issues"><img src="https://img.shields.io/github/issues/ArthurSonzogni/FTXUI"></img></a>
   <a href="https://github.com/ArthurSonzogni/FTXUI/graphs/contributors"><img src="https://img.shields.io/github/contributors/arthursonzogni/FTXUI?color=blue"></img></a>
+  <br/>
+  <a href="https://github.com/ArthurSonzogni/FTXUI/issues"><img src="https://img.shields.io/github/issues/ArthurSonzogni/FTXUI"></img></a>
+  <a href="https://repology.org/project/ftxui/versions"><img src="https://repology.org/badge/latest-versions/ftxui.svg" alt="latest packaged version(s)"></a>
   <a href="https://codecov.io/gh/ArthurSonzogni/FTXUI">
     <img src="https://codecov.io/gh/ArthurSonzogni/FTXUI/branch/master/graph/badge.svg?token=C41FdRpNVA"/>
   </a>
@@ -371,6 +373,8 @@ If you don't, the following packages have been created:
 - [conan.io](https://conan.io/center/ftxui)
 - [openSUSE](https://build.opensuse.org/package/show/devel:libraries:c_c++/ftxui)
 
+[![Packaging status](https://repology.org/badge/vertical-allrepos/ftxui.svg)](https://repology.org/project/ftxui/versions)
+
 ## Contributors
 
 <a href="https://github.com/ArthurSonzogni/FTXUI/graphs/contributors">