Add test status badge (#20)

* Add test status badge

* modifed by prettier

README.md

@@ -1,6 +1,6 @@
 # ⭐ VisualTorch ⭐
 
-[![python](https://img.shields.io/badge/python-3.10%2B-blue)]() [![pytorch](https://img.shields.io/badge/pytorch-2.0%2B-orange)]() [![Downloads](https://static.pepy.tech/personalized-badge/visualtorch?period=total&units=international_system&left_color=grey&right_color=green&left_text=PyPI%20Downloads)](https://pepy.tech/project/visualtorch)
+[![python](https://img.shields.io/badge/python-3.10%2B-blue)]() [![pytorch](https://img.shields.io/badge/pytorch-2.0%2B-orange)]() [![Downloads](https://static.pepy.tech/personalized-badge/visualtorch?period=total&units=international_system&left_color=grey&right_color=green&left_text=PyPI%20Downloads)](https://pepy.tech/project/visualtorch) [![Run Tests](https://github.com/willyfh/visualtorch/actions/workflows/pytest.yml/badge.svg)](https://github.com/willyfh/visualtorch/actions/workflows/pytest.yml)
 
 **VisualTorch** aims to help visualize Torch-based neural network architectures. Currently, this package supports generating layered-style architectures for Torch Sequential and Custom models. This package is adapted from [visualkeras](https://github.com/paulgavrikov/visualkeras) by [@paulgavrikov](https://github.com/paulgavrikov).