update homepage and quiver dependency
update homepage and quiver dependency

Also increased the minimum required SDK

dart-lang/sdk,dart-lang/sdk,dart-archive/dart2js_info,dart-lang/dart2js_info,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/dart2js_info,dart-lang/sdk,dart-archive/dart2js_info