feat: Exposed blur event on the input

[roopeshchinnakampalli]

I've added an event for blur which may be needful for the few scenario's like custom validation on loosing focus or show a custom error message.

[kotmatpockuh]

@webcat12345 please take a look at this PR. It's very important.

[reynirf]

@webcat12345 Can you take a look at this minor PR?
Also, I think the focus event should be exposed as well.