Added black and pytest badges (#91)

README.rst

@@ -2,19 +2,27 @@
 gilt
 ****
 
-.. image:: https://github.com/retr0h/gilt/workflows/Tests/badge.svg
+.. image:: https://img.shields.io/github/workflow/status/retr0h/gilt/Tests?style=flat
    :target: https://github.com/retr0h/gilt/actions
    :alt: Actions Status
 
-.. image:: https://badge.fury.io/py/python-gilt.svg
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg?style=flat
+   :target: https://github.com/psf/black
+   :alt: Black
+
+.. image:: https://img.shields.io/badge/test%20suite-pytest-009bdb.svg?style=flat
+   :target: https://docs.pytest.org/
+   :alt: PyTest
+
+.. image:: https://badge.fury.io/py/python-gilt.svg?style=flat
    :target: https://badge.fury.io/py/python-gilt
    :alt: PyPI Package
 
-.. image:: https://readthedocs.org/projects/gilt/badge/?version=latest
+.. image:: https://readthedocs.org/projects/gilt/badge/?version=latest&style=flat
    :target: https://gilt.readthedocs.io/en/latest/
    :alt: Documentation Status
 
-.. image:: https://img.shields.io/badge/license-MIT-brightgreen.svg
+.. image:: https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat
    :target: LICENSE
    :alt: Repository License