Feature request: ability to get only requested currencies

[Mystogab]

Hey it would be nice if some way like querry params or something someone can ask for specifik tokens, like I dont want the full list of rates, just a couple of them (for instance USD, EUR, and CAD for say something).
I assume it could save bandwidth and you know be cool, as I saw you are using cloudflarre pages to deploy it tho idk what is the flexibility to do this, if you are serving a static file then it would requiere some server side code running somewhere, so it may not be viable.

Let me know if there is something I can help with, im familiar with some services or options but idk if this suggestion may be out of place so im here anyway.

[joshbmarshall]

@Mystogab see #89 the reason for not having so many combinations is that the size is massive to have all the combinations. This is not an API that has server-generated information for each request, it's static data that's generated daily.

The bandwidth is negligible compared to even a tiny image on-page and it's easy to parse.

[karanatwal]

Inspired from this, I have created a solution, that can request specific currencies, Check it out - https://github.com/karanatwal/OpenCurrencyRates