Create github action

Author: dannys42

.github/workflows/swift.yml

@@ -0,0 +1,30 @@
+name: Swift
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  macos:
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build
+      run: swift build -v
+    - name: Run tests
+      run: swift test -v
+
+  linux:
+    runs-on: ubuntu-latest
+    container:
+      image: swift:5.4
+      options: --cap-add=SYS_PTRACE --security-opt seccomp=unconfined --security-opt apparmor=unconfined
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build
+      run: swift build -v
+    - name: Run tests
+      run: swift test -v --enable-test-discovery