モバイルアプリバージョン管理
podfile
platform
iosのminimumバージョンを設定する
iOS 13になっていたけど、こっちは、iOS12、、
! CocoaPods could not find compatible versions for pod "google_maps_flutter_ios": In Podfile:
google_maps_flutter_ios (from .symlinks/plugins/google_maps_flutter_ios/ios)
Specs satisfying the google_maps_flutter_ios (from .symlinks/plugins/google_maps_flutter_ios/ios) dependency were found, but they required a higher minimum deployment target.
iOS12