Use GitHub Actions instead of Travis CI

.github/workflows/test.yml

@@ -0,0 +1,37 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        racket_version:
+          - '6.9'
+          - '7.9'
+          - 'current'
+        include:
+          - racket_version: 'current'
+            allow_failure: true
+    name: Test Racket ${{ matrix.racket_version }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Install Racket
+        uses: Bogdanp/[email protected]
+        with:
+          architecture: 'x64'
+          distribution: 'full'
+          version: ${{ matrix.racket_version }}
+      - name: Install Package
+        run: make install
+      - name: Check Deps
+        run: make check-deps
+      - name: Run Tests
+        run: make test
+      - name: CI Extra Checks
+        run: make ci-extra-checks

README.md

@@ -4,7 +4,7 @@
 
 <p><sub><em><a href="http://www.flickr.com/photos/doug88888/4717363945/">Frog image by @Goug8888</a>, used under Creative Commons license <a href="http://creativecommons.org/licenses/by-nc-sa/2.0/">Attribution-NonCommercial-ShareAlike 2.0 Generic</a>.</em></sub></p>
 
-[![Build Status](https://travis-ci.org/greghendershott/frog.svg?branch=master)](https://travis-ci.org/greghendershott/frog)
+[![CI](https://github.com/greghendershott/frog/workflows/CI/badge.svg)](https://github.com/greghendershott/frog/actions)
 [![raco pkg install frog](https://img.shields.io/badge/raco_pkg_install-frog-aa00ff.svg)](http://pkgs.racket-lang.org/package/frog)
 [![MIT License](https://img.shields.io/badge/license-MIT-118811.svg)](frog/LICENSE)
 [![Documentation](https://img.shields.io/badge/Docs-Documentation-blue.svg)](http://docs.racket-lang.org/frog/index.html)