Remove last traces of Travis CI

* The build status badge is now for GitHub Actions.
* The documentation now mentions GitHub instead.
* Warnings in the YAML file have been fixed or ignored.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 438af9b6..c008aa87 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Asynchronous Lint Engine [![Travis CI Build Status](https://travis-ci.com/dense-analysis/ale.svg?branch=master)](https://travis-ci.com/dense-analysis/ale) [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/r0ef1xu8xjmik58d/branch/master?svg=true)](https://ci.appveyor.com/project/dense-analysis/ale) [![Join the chat at https://gitter.im/vim-ale/Lobby](https://badges.gitter.im/vim-ale/Lobby.svg)](https://gitter.im/vim-ale/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+# Asynchronous Lint Engine [![GitHub Build Status](https://github.com/dense-analysis/ale/workflows/CI/badge.svg)](https://github.com/dense-analysis/ale/actions?query=event%3Apush+workflow%3ACI+branch%3Amaster++) [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/r0ef1xu8xjmik58d/branch/master?svg=true)](https://ci.appveyor.com/project/dense-analysis/ale) [![Join the chat at https://gitter.im/vim-ale/Lobby](https://badges.gitter.im/vim-ale/Lobby.svg)](https://gitter.im/vim-ale/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 
 ![ALE Logo by Mark Grealish - https://www.bhalash.com/](https://user-images.githubusercontent.com/3518142/59195920-2c339500-8b85-11e9-9c22-f6b7f69637b8.jpg)