chore(quality): add codebeat badge to readme.md

Author: tinesoft

README.md

@@ -1,6 +1,7 @@
 
 # spring-esdata-loader
 [![Build  Status](https://travis-ci.org/tinesoft/spring-esdata-loader.svg?branch=master)](https://travis-ci.org/tinesoft/spring-esdata-loader)
+[![codebeat badge](https://codebeat.co/badges/3c8b3893-a79e-4e3d-b769-a9285c771be2)](https://codebeat.co/projects/github-com-tinesoft-spring-esdata-loader-master)
 
 `spring-esdata-loader` is a Java testing library to help you write integration tests for your [spring-data elasticsearch](https://spring.io/projects/spring-data-elasticsearch)-based projects, by allowing you to easily load data into Elasticsearch, using entity mappings (i.e domain classes annotated with `@Document`, `@Field`, etc) and via specific **Junit 4**'s Rules or **JUnit Jupiter**'s Extensions.