toolkit 0.3.0

Just a simple toolkit for flutter. Will add extensions to String, Map, and some common helper.

example/main.dart

import 'map.dart';
import 'random.dart';
import 'regexp.dart';
import 'sleep.dart';

main() async {
  mapExample();
  print("\n\n");
  randomExample();
  print("\n\n");
  regexpExample();
  print("\n\n");
  sleepExample();
}