fix resetting partial form data removing all other fields - REACT useForm

[devsrv]

ISSUE:
when resetting parts of form fields like: reset('password'), all other left fields data gets removed.

this is because the initialValue of the Array.reduce() is set to blank {} so the setData hook keeps only the fields data that were mentioned in reset() method called by user.

SOLVE:
if the initialValue is set to the current field values as a copy {...data} then it can be fixed ✌

[reinink]

Nice catch! 👍