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README.md

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-[![Travis Build
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-[![Appveyor Build Status](https://ci.appveyor.com/api/projects/status/d03c5laj01ap7qrt?svg=true)](https://ci.appveyor.com/project/mlouielu/twstock)
+![GitHub Actions Status](https://github.com/mlouielu/twstock/actions/workflows/ci.yml/badge.svg)
 [![Coverage Status](https://coveralls.io/repos/github/mlouielu/twstock/badge.svg?branch=master)](https://coveralls.io/github/mlouielu/twstock?branch=master)
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 [![Documentation Status](https://readthedocs.org/projects/twstock/badge/?version=latest)](http://twstock.readthedocs.io/zh_TW/latest/?badge=latest)