title: Flutter app is giving an error 'app_name' depends on flutter any from sdk which doesn't exist (unknown sdk "flutter'"), version solving failed
body: <p>while running <strong>flutter packages get</strong> command I'm getting the below error.</p>
  
  <p>Error started at the time I added the below plugin.</p>
  
  <pre><code>flutter_native_image:
    git: https://github.com/btastic/flutter_native_image.git
  </code></pre>
  
  <p>Even after removing the plugin I'm still getting the same error!</p>
  
  <p><a href="https://i.stack.imgur.com/KexjX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KexjX.png" alt="enter image description here"></a></p>
  
  <p>I'm trying to add <a href="https://github.com/btastic/flutter_native_image" rel="nofollow noreferrer">flutter_native_image</a> plugin </p>
  
  <p>pubspec.yaml</p>
  
  <pre><code>    name: login_authentication
      description: A new Flutter project.
  
      version: 1.0.0+1
  
      environment:
        sdk: "&gt;=2.0.0-dev.68.0 &lt;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: ^0.1.2
  
        firebase_auth:
  
        firebase_storage:
  
        google_sign_in:
  
        image_picker:
  
      dev_dependencies:
        flutter_test:
          sdk: flutter
  
      # The following section is specific to Flutter.
      flutter:
        uses-material-design: true
  </code></pre>