Edit a Review

[ChristoGrab]

Update and return an existing review.

• An authenticated user is required for a successful response
• Only the owner of the review is authorized to edit
• Review record is updated in the database after request
• Review data returned includes the id, userId, spotId, review,
  stars, createdAt, and updatedAt
• Error response with status 400 is given when body validations for the
  review, or stars are violated
• Error response with status 404 is given when a review does not exist with
  the provided id