Update README.md

README.md

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 [![PyPI version](https://badge.fury.io/py/aes-cipher.svg)](https://badge.fury.io/py/aes-cipher)
 [![Build Status](https://www.travis-ci.com/ebellocchia/aes_cipher.svg?branch=main)](https://travis-ci.com/ebellocchia/aes_cipher)
 [![codecov](https://codecov.io/gh/ebellocchia/aes_cipher/branch/main/graph/badge.svg)](https://codecov.io/gh/ebellocchia/aes_cipher)
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+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/9afd9788aa0e43faa491edcf6ed29d5e)](https://www.codacy.com/gh/ebellocchia/aes_cipher/dashboard?utm_source=github.com&utm_medium=referral&utm_content=ebellocchia/aes_cipher&utm_campaign=Badge_Grade)
 [![CodeFactor](https://www.codefactor.io/repository/github/ebellocchia/aes_cipher/badge)](https://www.codefactor.io/repository/github/ebellocchia/aes_cipher)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://raw.githubusercontent.com/ebellocchia/bip_utils/master/LICENSE)