Bump go_router from 7.1.1 to 9.0.0 in /platform_channels#431

dependabot[bot] wants to merge 1 commit intomainfiliph/samples:mainfrom

dependabot/pub/platform_channels/go_router-9.0.0filiph/samples:dependabot/pub/platform_channels/go_router-9.0.0Copy head branch name to clipboard