Cocoa pod install issue.

[stromyc]

[!] Unable to determine Swift version for the following pods:

- `flutter_rounded_progress_bar` 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.

Added the following code to the flutter_rounded_progress_bar.podspec file:

     s.swift_version = '4.2'
     s.ios.deployment_target = '9.0'

The progress bar now works.

[xaatw0]

I cannot find flutter_rounded_progress_bar.podspec, but I found flutter_rounded_progress_bar.podspec.json in ios/Pods/Local Podspecs.
Can I change it? If so, how do i change?