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README.md

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+[![Tests](https://github.com/hyperspy/exspy/actions/workflows/tests.yml/badge.svg)](https://github.com/hyperspy/exspy/actions/workflows/tests.yml)
+[![Docs](https://readthedocs.org/projects/exspy/badge/?version=latest)](https://exspy.readthedocs.io/en/latest/?badge=latest)
+[![codecov](https://codecov.io/gh/hyperspy/exspy/graph/badge.svg?token=X7T3LE121Q)](https://codecov.io/gh/hyperspy/exspy)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+
 **exSpy** is a Python package extending the functionality for multi-dimensional
 data analysis provided by the [HyperSpy](https://hyperspy.org) library. It is
 aimed at helping with the analysis of X-rays Energy Dispersive Spectroscopy (EDS)