Aliases for currencies

[jbriales]

Feature proposal:
Wouldn't it be nice to match currencies' names as well, as given e.g. in https://fixer.io/symbols?
E.g. so that currency 20 yen to eur also works, instead of needing jpy
In some cases this might be undetermined, like e.g. currency 20 dollar to eur, but then you could show a list of possible currencies to select from as output.