Create a Review for a Spot based on the Spot's Id

[wckliment]

Create and return a new review for a spot specified by id.

• An authenticated user is required for a successful response
• New review exists 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 spot does not exist with
  the provided id
• Error response with status 403 is given when a review already exists for
  the spot from the current user