Add badges (#26)

* Add Black badge

cjolowicz/cookiecutter-hypermodern-python-instance#21

* Add badge for supported Python versions

cjolowicz/cookiecutter-hypermodern-python-instance#22

* Add license badge

cjolowicz/cookiecutter-hypermodern-python-instance#23

{{cookiecutter.project_name}}/README.md

@@ -1,6 +1,9 @@
 [![Tests](https://github.com/{{cookiecutter.github_user}}/{{cookiecutter.project_name}}/workflows/Tests/badge.svg)](https://github.com/{{cookiecutter.github_user}}/{{cookiecutter.project_name}}/actions?workflow=Tests)
 [![Codecov](https://codecov.io/gh/{{cookiecutter.github_user}}/{{cookiecutter.project_name}}/branch/master/graph/badge.svg)](https://codecov.io/gh/{{cookiecutter.github_user}}/{{cookiecutter.project_name}})
 [![PyPI](https://img.shields.io/pypi/v/{{cookiecutter.project_name}}.svg)](https://pypi.org/project/{{cookiecutter.project_name}}/)
+[![Python Version](https://img.shields.io/pypi/pyversions/{{cookiecutter.project_name}})](https://pypi.org/project/{{cookiecutter.project_name}})
 [![Read the Docs](https://readthedocs.org/projects/{{cookiecutter.project_name}}/badge/)](https://{{cookiecutter.project_name}}.readthedocs.io/)
+[![License](https://img.shields.io/pypi/l/{{cookiecutter.project_name}})](https://opensource.org/licenses/MIT)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 # {{cookiecutter.project_name}}