Update README.md

Author: daveespo

README.md

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 FFLib Apex Common
 =================
 
-[![Build Status](https://travis-ci.org/apex-enterprise-patterns/fflib-apex-common.svg)](https://travis-ci.org/apex-enterprise-patterns/fflib-apex-common) 
+![Push Source and Run Apex Tests](https://github.com/apex-enterprise-patterns/fflib-apex-common/workflows/Create%20a%20Scratch%20Org,%20Push%20Source%20and%20Run%20Apex%20Tests/badge.svg)
+
 
 **Dependencies:** Must deploy [ApexMocks](https://github.com/apex-enterprise-patterns/fflib-apex-mocks) before deploying this library