Merge pull request #162 from fktn-k/feature/160_integrate_with_codacy

#160 Added the Codacy badge to README.md

README.md

@@ -2,6 +2,7 @@
 [![Windows](https://github.com/fktn-k/fkYAML/workflows/Windows/badge.svg)](https://github.com/fktn-k/fkYAML/actions?query=workflow%3AWindows)
 [![macOS](https://github.com/fktn-k/fkYAML/workflows/macOS/badge.svg)](https://github.com/fktn-k/fkYAML/actions?query=workflow%3AmacOS)
 [![Coverage Status](https://coveralls.io/repos/github/fktn-k/fkYAML/badge.svg?branch=develop)](https://coveralls.io/github/fktn-k/fkYAML?branch=develop)
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/cded6969c7344ea5be60ab472e13000f)](https://app.codacy.com/gh/fktn-k/fkYAML/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
 [![CodeQL](https://github.com/fktn-k/fkYAML/workflows/CodeQL/badge.svg)](https://github.com/fktn-k/fkYAML/actions?query=workflow%3ACodeQL)
 [![GitHub Releases](https://img.shields.io/github/release/fktn-k/fkYAML.svg)](https://github.com/fktn-k/fkYAML/releases/latest)
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/fktn-k/fkYAML/develop/LICENSE.txt)