Add Mac,Windows and Linux CI tests

Author: srevinsaju

README.md

@@ -2,11 +2,13 @@
 
 # guiscrcpy
 
+![Linux](https://github.com/srevinsaju/guiscrcpy/workflows/Linux/badge.svg)
+![Windows](https://github.com/srevinsaju/guiscrcpy/workflows/Windows/badge.svg)
+![Mac OS](https://github.com/srevinsaju/guiscrcpy/workflows/Mac%20OS/badge.svg)
 [![codecov](https://codecov.io/gh/srevinsaju/guiscrcpy/branch/master/graph/badge.svg)](https://codecov.io/gh/srevinsaju/guiscrcpy)
 [![Updates](https://pyup.io/repos/github/srevinsaju/guiscrcpy/shield.svg)](https://pyup.io/repos/github/srevinsaju/guiscrcpy/)
 [![Python 3](https://pyup.io/repos/github/srevinsaju/guiscrcpy/python-3-shield.svg)](https://pyup.io/repos/github/srevinsaju/guiscrcpy/)
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/guiscrcpy?style=flat-square)
-
 ![PyPI](https://img.shields.io/pypi/v/guiscrcpy?style=flat-square)
 ![PyPI - Wheel](https://img.shields.io/pypi/wheel/guiscrcpy?style=flat-square)
 ![PyPI - Downloads](https://img.shields.io/pypi/dm/guiscrcpy?color=dark%20green&logo=PYPI&logoColor=Green&style=flat-square)