Flutter project must be Swift compatible?

[marcuslma]

Hi, how are you?
Is necessary that my project be Swift compatible?
I'm facing the following error, with a brand new project.

- `amplitude_flutter` does not specify a Swift version and none of the targets (`Runner`) integrating it have the
    `SWIFT_VERSION` attribute set. Please contact the author or set the `SWIFT_VERSION` attribute in at least one of
    the targets that integrate this pod.

    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/installer/xcode/target_validator.rb:125:in
    `verify_swift_pods_swift_version'
    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/installer/xcode/target_validator.rb:39:in `validate!'
    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/installer.rb:590:in `validate_targets'
    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/installer.rb:158:in `install!'
    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/command/install.rb:52:in `run'
    /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/lib/cocoapods/command.rb:52:in `run'
    /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.1/bin/pod:55:in `<top (required)>'
    /usr/local/bin/pod:23:in `load'
    /usr/local/bin/pod:23:in `<main>'

[haoliu-amp]

@marcuslma Hi, yes, since the some parts of the plugin is written in Swift.