Fix type of Redux Form event handlers. (#31607)

* Fix type of Redux Form event handlers.

* Rename `fieldName` to `name` to keep flow type definitions consistent with Redux Form naming.

Co-Authored-By: davidgomes <davidrafagomes@gmail.com>

* Adds the missing name parameter to the onFocus and onDragStart event handlers in redux-form.

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

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

Co-Authored-By: davidgomes <davidrafagomes@gmail.com>

* Removes weird space I added accidentally.

types/redux-form/lib/Field.d.ts

@@ -16,8 +16,8 @@ export type Formatter = (value: any, name: string) => any;
 export type Parser = (value: any, name: string) => any;
 export type Validator = (value: any, allValues?: any, props?: any, name?: any) => any;
 
-export type EventHandler<Event> = (event: Event) => void;
-export type EventWithDataHandler<Event> = (event?: Event, newValue?: any, previousValue?: any) => void;
+export type EventHandler<Event> = (event: Event, name?: string) => void;
+export type EventWithDataHandler<Event> = (event?: Event, newValue?: any, previousValue?: any, name?: string) => void;
 
 export interface EventOrValueHandler<Event> extends EventHandler<Event> {
     (value: any): void;

types/redux-form/redux-form-tests.tsx

@@ -279,8 +279,8 @@ const Test = reduxForm<TestFormData>({
                             <Field
                                 name="field4"
                                 component="input"
-                                onChange={(event, newValue, previousValue) => {}}
-                                onBlur={(event, newValue, previousValue) => {}}
+                                onChange={(event, newValue, previousValue, fieldName) => {}}
+                                onBlur={(event, newValue, previousValue, fieldName) => {}}
                             />
 
                             <ImmutableField