get
Fetches the historical prices for a given item from the RuneScape Grand Exchange API.
This method makes an HTTP GET request to the API and parses the JSON response to extract the price history for the specified item over the last 90 days.
Return
A list of integers representing the historical prices for the item over the last 90 days, or an empty list if the item is not found.
Parameters
item
The name of the item to fetch the historical prices for.