* В pubspec.yaml the Flutter.plugin. {Androidpackage, iosprefix, плагинссовые}. Вместо этого используйте ключ Flutter.plugin.platforms, введенный в Flutter 1.10.0

There is a typo in your pubspec.yaml. The correct keyword is "platforms", not "platform". So this should fix it:

flutter:
  plugin:
    platforms:
      ios:
        pluginClass: FlutterBlePeripheralPlugin
      android:
        package: dev.steenbakker.flutter_ble_peripheral
        pluginClass: FlutterBlePeripheralPlugin
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