ci: migrate CI to GitHub Actions

.github/workflows/test.yml

@@ -43,3 +43,6 @@ jobs:
       - name: Validate PR commits with commitlint
         if: github.event_name == 'pull_request'
         run: npx commitlint --from ${{ github.event.pull_request.head.sha }}~${{ github.event.pull_request.commits }} --to ${{ github.event.pull_request.head.sha }} --verbose
+
+      - name: Coveralls
+        uses: coverallsapp/github-action@v2

README.md

@@ -20,7 +20,7 @@
 <span align="center">
 
 [![GitHub package.json version (main)](https://img.shields.io/github/package-json/v/eta-dev/eta/main?label=current%20version)](https://www.npmjs.com/package/eta)
-[![Travis](https://img.shields.io/travis/com/eta-dev/eta/master.svg)](https://travis-ci.com/eta-dev/eta)
+[![GitHub Actions Status](https://github.com/eta-dev/eta/actions/workflows/test.yml/badge.svg)](https://github.com/eta-dev/eta/actions)
 [![All Contributors][logo]](#contributors-)
 [![Coveralls](https://img.shields.io/coveralls/eta-dev/eta.svg)](https://coveralls.io/github/eta-dev/eta)
 [![Donate](https://img.shields.io/badge/donate-paypal-blue.svg)](https://paypal.me/bengubler)