WASM support!

[fadone]

Currently the package doesn't support wasm:

Package not compatible with runtime wasm
Because:
package:flutter_screen_recording/flutter_screen_recording.dart that imports:
package:flutter_foreground_task/flutter_foreground_task.dart that imports:
package:flutter_foreground_task/flutter_foreground_task_platform_interface.dart that imports:
package:flutter_foreground_task/flutter_foreground_task_method_channel.dart that imports:
package:flutter_foreground_task/models/service_options.dart that imports:
package:platform/platform.dart that imports:
package:platform/src/interface/local_platform.dart that imports:
dart:io