[Feature request] Currency conversion for stocks/crypto quotes

[josemi-ca]

Now that IEX Cloud supports currency conversion (https://iexcloud.io/docs/api/#latest-currency-rates)
A very useful feature for the library would be to have the option to convert stock and crypto quotes to local currencies.

For example, this would allow American users to obtain UK stock quotes directly converted to USD or viceversa. This would also enable checking the price of cryptocurrencies in non-supported currencies, such as EUR.