Adds multiple subscribe event handling

[Marcisbee]

Description

Now can subscribe to multiple events with one subscription and transformer.

Example usage

const Pressed = new Subscribe()
  .on('mousedown mouseup', (e, name) => name === 'mousedown')

const Mouse = new Store({
  pressed: Pressed(false),
})

Mouse store will listen to mousedown and mouseup for pressed field.

When mouse is pressed output would be {pressed: true}; When released, it would be {pressed: false}.