Use github actions

Author: twalpole

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+# This workflow will download a prebuilt Ruby version, install dependencies and
+# run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: Build
+
+"on": push
+
+env:
+  RUBYOPTS: "--disable-did-you-mean"
+  JAVA_OPTS: "-Djava.security.egd=file:/dev/urandom"
+
+jobs:
+  rake:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["3.0", "3.1", "3.2"]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rake