Fix type of Redux Form event handlers.

[davidgomes]

This PR updates the event handlers for the onBlur, onDragStart, onChange, onDrop and onFocus to support the optional name (field name) parameter.

I ran npm run test and npm run lint redux-form. Both returned no errors.

https://redux-form.com/7.4.2/docs/api/field.md/#-code-onblur-event-newvalue-previousvalue-name-gt-void-code-optional-

Here above is the API definition for the functions that I changed, which were missing the last argument.

[typescript-bot]

@davidgomes Thank you for submitting this PR!

🔔 @CarsonF @aikoven @LKay @bancek @alsiola @tehbi4 @huwmartin @ethanresnick @Reggino @maddijoyce @smifun - please review this PR in the next few days. Be sure to explicitly select Approve or Request Changes in the GitHub UI so I know what's going on.

If no reviewer appears after a week, a DefinitelyTyped maintainer will review the PR instead.

[typescript-bot]

After 5 days, no one has reviewed the PR 😞. A maintainer will be reviewing the PR in the next few days and will either merge it or request revisions. Thank you for your patience!

[mshaaban088]

@davidgomes Thanks for fixing type definitions.
I appreciate if you could take a look at my suggestions

[davidgomes]

@mshaaban088 great suggestions, I edited the PR's description to account for these changes.

[mshaaban088]

@davidgomes Awesome!
One minor suggestion, as onDrop is implicitly affected, it makes sense to add it too to the description ;)

[davidgomes]

@davidgomes Awesome!
One minor suggestion, as onDrop is implicitly affected, it makes sense to add it too to the description ;)

Done!

[mshaaban088]

Thanks @davidgomes