Add support for crypto, fix api calls and format price

[Elaniobro]

Description: ✍️

• This stopped working, due to IEX sunsetting their api and moving it to a new service, IEX cloud ☁️
• I have since updated the API call, and documented where one needs to insert their API key.
• I also added a formatMoney() function that will now properly format the price
• Added support for crypto based on the USD pairing for the symbol
  • ex: BTC -> BTCUSD
  • added default values for crypto: BTCUSDT,LTCUSDT,ETHUSDT
• Updated README.md

Issue(s): 🎟️

9

5

Visual: 🔍

Before:

After:

Reference(s): 📖

iexcloud api sunsetting 🌆

[Elaniobro]

Per #14, I have since decided not to pursue this merge. I will begin maintaining this in my own repo. Thank you for the jumpstart @alexyak!!