Add badges to readme

Author: fhunleth

README.md

@@ -1,5 +1,10 @@
 # CircularBuffer
 
+[![Hex version](https://img.shields.io/hexpm/v/circular_buffer.svg "Hex version")](https://hex.pm/packages/circular_buffer)
+[![API docs](https://img.shields.io/hexpm/v/circular_buffer.svg?label=hexdocs "API docs")](https://hexdocs.pm/circular_buffer/CircularBuffer.html)
+[![CI](https://github.com/elixir-toniq/circular_buffer/actions/workflows/elixir.yml/badge.svg)](https://github.com/elixir-toniq/circular_buffer/actions/workflows/elixir.yml)
+[![REUSE status](https://api.reuse.software/badge/github.com/elixir-toniq/circular_buffer)](https://api.reuse.software/info/github.com/elixir-toniq/circular_buffer)
+
 CircularBuffer provides a general-purpose CircularBuffer data structure.
 
 Docs: [https://hexdocs.pm/circular_buffer](https://hexdocs.pm/circular_buffer).