update readme

README.md

@@ -1,3 +1,8 @@
+[![multilayer-alignment](https://github.com/letiziaia/multilayer-alignment/actions/workflows/validate.yml/badge.svg)](https://github.com/letiziaia/multilayer-alignment/actions/workflows/validate.yml)
+[![Python 3.8+](https://img.shields.io/badge/python-3.8+-blue.svg)](https://www.python.org/downloads/release/python-380/)
+[![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://github.com/letiziaia/multilayer-alignment/blob/main/LICENSE)
+[![codecov](https://codecov.io/gh/letiziaia/multilayer-alignment/graph/badge.svg?token=KSXP8K5A8S)](https://codecov.io/gh/letiziaia/multilayer-alignment)
+
 # multilayer-alignment
 
 This repository implements an algorithm for quantifying multilayer alignment.
@@ -30,4 +35,4 @@ Additional issues can be found by running `python3 -m flake8 .` and `python3 -m
 
 ## Tests
 
-This code has test coverage for python 3.8, 3.9, 3.10, and 3.11. Current test coverage is at 89%.
+This code has test coverage for python 3.8, 3.9, 3.10, and 3.11.