Add SwiftTrie package

.github/workflows/swiftlint.yml

@@ -0,0 +1,16 @@
+name: SwiftLint
+
+on:
+  push:
+    branches: [ '**' ]
+  workflow_dispatch:
+
+jobs:
+  SwiftLint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: GitHub Action for SwiftLint
+      uses: norio-nomura/action-swiftlint@3.2.1
+      with:
+        args: --strict