title: Flutter After Upgrade can't run application version solving failed
body: <p>Nope. <a href="https://stackoverflow.com/questions/51375674/error-after-running-flutter-upgrade">This answer doesn't work</a> this time for me.</p>
  
  <p>My <code>flutter doctor -v</code></p>
  
  <pre><code>[✓] Flutter (Channel master, v0.5.9-pre.68, on Linux, locale en_US.UTF-8)
      • Flutter version 0.5.9-pre.68 at /home/khophi/.flutterSetup
      • Framework revision 5cd97f0004 (2 hours ago), 2018-08-16 14:10:22 -0700
      • Engine revision 4ee648914f
      • Dart version 2.1.0-dev.0.0.flutter-be6309690f
  
  [✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
      • Android SDK at /home/khophi/Android/sdk
      • Android NDK location not configured (optional; useful for native profiling support)
      • Platform android-27, build-tools 27.0.3
      • ANDROID_HOME = /home/khophi/Android/sdk
      • Java binary at: /usr/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_171-8u171-b11-0ubuntu0.18.04.1-b11)
      • All Android licenses accepted.
  
  [✗] Android Studio (not installed)
      • Android Studio not found; download from https://developer.android.com/studio/index.html
        (or visit https://flutter.io/setup/#android-setup for detailed instructions).
  
  [✓] VS Code (version 1.26.0)
      • VS Code at /usr/share/code
      • Flutter extension version 2.17.1
  
  [✓] Connected devices (1 available)
      • klte • 956e8b90 • android-arm • Android 8.1.0 (API 27)
  
  ! Doctor found issues in 1 category.
  </code></pre>
  
  <p>When I run <code>flutter run</code>, I get:</p>
  
  <pre><code>Running "flutter packages get" in townsquare...                  
  The current Dart SDK version is 2.1.0-dev.0.0.flutter-be6309690f.
  
  Because flutter_circular_chart 0.0.3 requires SDK version &gt;=1.19.0 &lt;2.0.0 and no versions of flutter_circular_chart match &gt;0.0.3 &lt;0.1.0, flutter_circular_chart ^0.0.3 is forbidden.
  So, because mobile depends on flutter_circular_chart ^0.0.3, version solving failed.
  
  pub get failed (1)
  </code></pre>
  
  <p>This is my <code>pubspec.yaml</code></p>
  
  <pre><code>name: mobile
  description: A new Flutter project.
  
  version: 1.0.0+1
  
  dependencies:
    flutter:
      sdk: flutter
  
    cupertino_icons: ^0.1.2
    carousel: ^0.0.1
    http: "^0.11.3+16"
    validate: "^1.6.0"
    url_launcher: "^3.0.2"
    shared_preferences: "^0.4.2"
    font_awesome_flutter: "^7.0.0"
    flutter_circular_chart: "^0.0.3"
    flutter_local_notifications: ^0.3.6
  
  dev_dependencies:
    flutter_test:
      sdk: flutter
  
    assets:
     - images/flutter.jpg
     - images/logo.png
     - images/bg_viewer.jpg
  </code></pre>
  
  <p>With the above, please enlighten me, what's wrong?</p>