Enabled GitHub CI action

Author: lukaskubanek

.github/workflows/swift.yml

@@ -0,0 +1,27 @@
+name: Swift CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    strategy:
+      matrix:
+        xcode: [ "15.4", "16.1" ]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Select Xcode ${{ matrix.xcode }}
+      run: sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode }}.app
+
+    - name: Build
+      run: swift build -v
+
+    - name: Run tests
+      run: swift test -v