我正在尝试将此http package安装到我的Flutter应用程序。
但是当我执行flutter pub get时，我得到这个错误：

The current Dart SDK version is 2.13.4.

Because http 0.13.4 requires SDK version >=2.14.0 <3.0.0 and no versions of http match >0.13.4 <0.14.0, http ^0.13.4 is forbidden.
So, because app depends on http ^0.13.4, version solving failed.
pub get failed (1; So, because spotlight depends on http ^0.13.4, version solving failed.)

然而，我在此之前执行了flutter upgrade，它说我在最新的版本，其中包括飞镖。

Flutter is already up to date on channel master
Flutter 2.9.0-1.0.pre.198 • channel master • https://github.com/flutter/flutter.git
Framework • revision 3f775d864e (11 hours ago) • 2021-12-26 08:59:07 -0500
Engine • revision d56b72b117
Tools • Dart 2.16.0 (build 2.16.0-135.0.dev) • DevTools 2.9.2

这是为什么呢？
编辑：pubspec.yaml下方：

name: app
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  http: ^0.13.4

dev_dependencies:
  flutter_test:
    sdk: flutter

在我的设置中，它显示为2.13.4：

编辑：所以问题是当我输入which flutter时Flutter路径不正确。它与我在Android Studio中的路径不同。我如何更改这一点？