title: How can I downgrade the rxdart plugin in flutter?
body: <p>I followed this as shown (only first 3 minutes are relevant for my question): <a href="https://m.youtube.com/watch?v=MYHVyl-juUk" rel="nofollow noreferrer">https://m.youtube.com/watch?v=MYHVyl-juUk</a></p>
  
  <p>When I try to run it this appears in the console:</p>
  
  <p>Because geoflutterfire 2.0.3+2 depends on rxdart ^0.20.0 and no versions of geoflutterfire match >2.0.3+2 &lt;3.0.0, geoflutterfire ^2.0.3+2 requires rxdart ^0.20.0.
  So, because my_app depends on both rxdart ^0.21.0 and geoflutterfire ^2.0.3+2, version solving failed.</p>
  
  <p>The current Version (and the Version I installed) is rxdart 0.21.0. I tried to downgrade it by changing it to 0.20.0 and flutter packages get, but it didn’t work.</p>
  
  <p>Btw, it’s my first time experimenting with plugins, so I don’t have any clue about solving that kind of problems... </p>
  
  <p>What can I do to make this work? </p>
  
  <p>Kind regards</p>
  
  <p>UPDATE: </p>
  
  <p>After I tried this:</p>
  
  <pre><code>rxdart: any
  </code></pre>
  
  <p>the console threw this:</p>
  
  <pre><code>2019-04-08 12:06:04.178 defaults[36786:354646] 
  The domain/default pair of (/Users/privat/Documents/Dev/my_app/ios/Runner/Info, CFBundleIdentifier) does not exist
  
  
  Xcode's output:
  ↳
      /Library/flutter/.pub-cache/hosted/pub.dartlang.org/geoflutterfire-2.0.3+2/ios/Classes/GeoflutterfirePlugin.m:2:9: fatal error:
      'geoflutterfire/geoflutterfire-Swift.h' file not found
      #import &lt;geoflutterfire/geoflutterfire-Swift.h&gt;
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      1 error generated.
  </code></pre>
  
  <p>Then I edited the Podfile Code:
  Code that needed to be added or edited are marked with "** ...... **"</p>
  
  <pre><code>    target 'Runner' do
        ** use_frameworks!  **
      ........ ......
  
      post_install do |installer|
            installer.pods_project.targets.each do |target|
              target.build_configurations.each do |config|
                config.build_settings['ENABLE_BITCODE'] = 'NO'
                ** config.build_settings['SWIFT_VERSION'] = '4.0' **
              end
            end
          end
  </code></pre>
  
  <p>Then I deleted my Podfile.lock and tried again, and the app was compiled successfully. <strong>Thanks to C4C!</strong></p>