add codeclimate badge

README.md

@@ -1,10 +1,11 @@
 # Pheature Flags Toggle Core
 
 [![Latest Version on Packagist][ico-version]][link-packagist]
+[![Quality Score][ico-code-quality]][link-code-quality]
 [![Type coverage][ico-psalm]][link-psalm]
 [![Test Coverage][ico-coverage]][link-coverage]
 [![Mutation testing coverage][ico-mutant]][link-mutant]
-[![Quality Score][ico-code-quality]][link-code-quality]
+[![Maintainability][ico-maintain]][link-maintain]
 [![Total Downloads][ico-downloads]][link-downloads]
 
 Pheature flags toggle core library, take a look to our [main package](https://github.com/pheature-flags/pheature-flags) to see our roadmap and project status.
@@ -42,3 +43,5 @@ knowledge to the community. For this reason we release all our packages under [B
 [link-downloads]: https://packagist.org/packages/pheature/toggle-core
 [ico-mutant]: https://img.shields.io/endpoint?style=flat&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fpheature-flags%2Ftoggle-core%2F1.0.x
 [link-mutant]: https://dashboard.stryker-mutator.io/reports/github.com/pheature-flags/toggle-core/1.0.x
+[ico-maintain]: https://api.codeclimate.com/v1/badges/bfd8ab1bc4664ec724c0/maintainability
+[link-maintain]: https://codeclimate.com/github/pheature-flags/toggle-model/maintainability