feat: #1 Add post method

lib/cn/gitlab/app/frameworks/request/request_template.dart

 import 'package:dio/dio.dart' as dio;
+import 'package:flutter/foundation.dart';
 import 'package:jihu_gitlab_app/cn/gitlab/app/frameworks/request/environment.dart';
 import 'package:jihu_gitlab_app/cn/gitlab/app/frameworks/request/response.dart';
 
@@ -18,4 +19,18 @@ class RequestTemplate {
   Future<Response<T>> get<T>(String url) async {
     return Response(await _dio.get(_environment.url() + url));
   }
+
+  Future<Response<T>> post<T>(String path, Map<String, dynamic> data) async {
+    try {
+      var response = await _dio.post(url(path), data: data);
+      return Response(response);
+    } catch (e) {
+      print(e);
+      rethrow;
+    }
+  }
+
+  String url(String path) {
+    return _environment.url() + path;
+  }
 }

lib/cn/gitlab/app/frameworks/request/response.dart

@@ -5,7 +5,7 @@ class Response<T> {
 
   Response(this._response);
 
-  T? body() {
+  T body() {
     return _response.data;
   }
 }