feat(http): implements doublelinked list for middlewares

packages/wyatt_http_client/lib/src/utils/http_methods.dart

@@ -0,0 +1,28 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+enum HttpMethods {
+  head('HEAD'),
+  get('GET'),
+  post('POST'),
+  put('PUT'),
+  patch('PATCH'),
+  delete('DELETE');
+
+  final String method;
+
+  const HttpMethods(this.method);
+}