Returning item instead of data for onSubmitted event

[ravichandran-blog]

Q	A
Bugfix?	[ X ]
New feature?	[ ]
New sample?	[ ]

What's in this Pull Request?

Returning item instead of data for the submitted event and some corrections in the documentation

[AJIXuMuK]

Hi @ravichandran-blog,

I have intentionally changed the returning value from PnPJS item instance to the data.
Some developers may not use PnPJS and want just the data for the created/modified item. We, as a library, should support this scenario.

Potentially we can return the PnPJS item as a second parameter or based on additional property.
What do you think @joelfmrodrigues @estruyf ?

[joelfmrodrigues]

Sounds good to me 👍 Although everyone really should use PnPjs as it's great, it's their choice at the end of the day and I agree that we should not "enforce it".

[AJIXuMuK]

I have added a new property returnListItemInstanceOnSubmit. By default it is true.
If it is set the second parameter of onSubmitted will contain an instance of PnPJS IItem