Update README.md

Author: apptekstudios

README.md

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 [![Stargazers][stars-shield]][stars-url]
 [![Issues][issues-shield]][issues-url]
 [![MIT License][license-shield]][license-url]
-[![Build Status](https://travis-ci.com/apptekstudios/ASCollectionView.svg?branch=master)](https://travis-ci.com/apptekstudios/ASCollectionView)
+![Build status](https://github.com/apptekstudios/ASCollectionView/workflows/Build/badge.svg?branch=master)
 
 # ASCollectionView
 A SwiftUI implementation of UICollectionView & UITableView. Here's some of its useful features: