Migrate from Travis CI to GitHub Actions

.github/workflows/test.yml

@@ -0,0 +1,22 @@
+name: Tests
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ['2.7', '3.0', '3.1', '3.2', '3.3']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - run: bundle exec appraisal install
+      - run: bundle exec appraisal rake test

README.md

@@ -1,6 +1,6 @@
 # Sift
 
-[![Build Status](https://travis-ci.org/procore/sift.svg?branch=master)](https://travis-ci.org/procore/sift)
+[![Tests](https://github.com/procore/sift/actions/workflows/test.yml/badge.svg)](https://github.com/procore/sift/actions/workflows/test.yml)
 
 A tool to build your own filters and sorts with Rails and Active Record!