Swap TravisCI for GitHub Actions:

.gtihub/workflows/main.yml

@@ -0,0 +1,26 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '1.19.5'
+
+      - name: Install dependencies
+        run: go get .
+
+      - name: Build
+        run: go build -v ./...
+
+      - name: Test
+        run: go test -v ./...