Merge pull request ra1028#69 from ra1028/azure-pipeline-badge

Update README

README.md

@@ -16,7 +16,8 @@ The algorithm is optimized based on the Paul Heckel's algorithm.
 <a href="https://github.com/Carthage/Carthage"><img alt="Carthage" src="https://img.shields.io/badge/Carthage-compatible-yellow.svg"/></a>
 <a href="https://swift.org/package-manager"><img alt="Swift Package Manager" src="https://img.shields.io/badge/SwiftPM-compatible-yellowgreen.svg"/></a>
 </br>
-<a href="https://travis-ci.org/ra1028/DifferenceKit"><img alt="Build Status" src="https://travis-ci.org/ra1028/DifferenceKit.svg?branch=master"/></a>
+<a href="https://dev.azure.
+com/ra1028/GitHub/_build/latest?definitionId=1&branchName=master"><img alt="Build Status" src="https://dev.azure.com/ra1028/GitHub/_apis/build/status/ra1028.DifferenceKit?branchName=master"/></a>
 <a href="https://developer.apple.com/"><img alt="Platform" src="https://img.shields.io/badge/platform-iOS%20%7C%20macOS%20%7C%20tvOS%20%7C%20watchOS%20%7C%20Linux-green.svg"/></a>
 <a href="https://github.com/ra1028/DifferenceKit/blob/master/LICENSE"><img alt="Lincense" src="http://img.shields.io/badge/License-Apache%202.0-black.svg"/></a>
 </p>