Add sugar for events

[tshemsedinov]

Support if-style

swayer/examples/todo-app/app/features/todo/main/todo-item/todo-item.component.js

Lines 48 to 56 in 9ffa7bd

	keyup(event) {
	const value = this.props.value;
	if (event.key === 'Enter' && value) {
	todoCtrl.updateEditingTodo(todo, value);
	this.emitCustomEvent('updateTitleEvent', todo);
	this.blur();
	} else if (event.key === 'Escape') {
	this.blur();
	}

but implement something like this:

keyup: {
  enter(event) {
    const value = this.props.value;
    if (value) {
      todoCtrl.updateEditingTodo(todo, value);
      this.emitCustomEvent('updateTitleEvent', todo);
      this.blur();
    }
  },
  escape() { 
    this.blur(); 
  }
}