chore: fix all problems

packages/wyatt_http_client/lib/src/pipeline.dart

@@ -30,6 +30,8 @@ class Pipeline {
   /// Add a [Middleware] to this [Pipeline]
   Pipeline addMiddleware(Middleware middleware) {
     _middlewares.add(middleware);
+    // TODO(hpcl): use Dart cascades instead of returning this
+    // ignore: avoid_returning_this
     return this;
   }