feat: Add source details in onValueChange

[nikhil-varma]

Describe the issue/change

This PR adds a source object in the onValueChange function which returns the event object and the source of the trigger

Describe the changes proposed/implemented in this PR

API change for onValueChange to allow getting the source details and the event object

Link Github issue if this PR solved an existing issue

Issue: #587

Example usage (If applicable)

<NumberFormat
  value={this.state.profit}
  thousandSeparator={true}
  prefix={'$'}
  onValueChange={(values, sourceInfo) => {
    const { formattedValue, value } = values;
    // Event is a Synthetic Event wrapper which holds target and other information. Source tells whether the reason for this function being triggered was an 'event' or due to a 'prop' change
    const { event, source } = sourceInfo;
  }}

Screenshot (If applicable)#### Please check which browsers were used for testing

• Chrome
• Chrome (Android)
• Safari (OSX)
• Safari (iOS)
• Firefox
• Firefox (Android)

[nikhil-varma]

@s-yadav API changes are done. Any suggestions on what kind of documentation examples we can add? I think we can give more details. What do you say?