Add YouTubeKit (#1882)

Author: b5i

contents.json

@@ -8579,6 +8579,13 @@
       "homepage": "https://github.com/reers/ReerCodable",
       "tags":["swift", "codable"]
     },
+    {
+      "title": "YouTubeKit",
+      "category": "api",
+      "description": "Interact with the YouTube API without an API key.",
+      "homepage": "https://github.com/b5i/YouTubeKit",
+      "tags": ["youtube", "api", "swift"]
+    },
     {
       "title":"SwiftUIRoutes",
       "category":"app-routing",