docs(readme): update readme

Author: olavoparno

README.md

@@ -8,6 +8,10 @@
 
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+| Statements                                                                  | Branches                                                                  | Functions                                                                  | Lines                                                                  |
+| --------------------------------------------------------------------------- | ------------------------------------------------------------------------- | -------------------------------------------------------------------------- | ---------------------------------------------------------------------- |
+| ![Statements](https://img.shields.io/badge/Coverage-100%25-brightgreen.svg) | ![Branches](https://img.shields.io/badge/Coverage-100%25-brightgreen.svg) | ![Functions](https://img.shields.io/badge/Coverage-100%25-brightgreen.svg) | ![Lines](https://img.shields.io/badge/Coverage-100%25-brightgreen.svg) |
+
 ## Table of Contents
 
 - [Running example](#running-example)