XP-508 Replace circleci badge (#225)

* XP-508 Replace circleci badge with github workflow

* XP-508 Add link

* XP-508 Fix link

* XP-508 Fix styles

* XP-508 Escape parentheses

README.md

@@ -1,6 +1,6 @@
-[![CircleCI](https://img.shields.io/circleci/build/github/xainag/xain-fl/master?style=flat-square)](https://circleci.com/gh/xainag/xain-fl/tree/master)
-[![PyPI](https://img.shields.io/pypi/v/xain-fl?style=flat-square)](https://pypi.org/project/xain-fl/)
-[![GitHub license](https://img.shields.io/github/license/xainag/xain-fl?style=flat-square)](https://github.com/xainag/xain-fl/blob/master/LICENSE)
+[![Workflow Lint and test (master)](https://github.com/xainag/xain-fl/workflows/Lint%20and%20test%20%28master%29/badge.svg)](https://github.com/xainag/xain-fl)
+[![PyPI](https://img.shields.io/pypi/v/xain-fl)](https://pypi.org/project/xain-fl/)
+[![GitHub license](https://img.shields.io/github/license/xainag/xain-fl)](https://github.com/xainag/xain-fl/blob/master/LICENSE)
 [![Documentation Status](https://readthedocs.org/projects/xain-fl/badge/?version=latest)](https://xain-fl.readthedocs.io/en/latest/?badge=latest)
 [![Gitter chat](https://badges.gitter.im/xainag.png)](https://gitter.im/xainag)