Yahoo API deprecated for data reader

[kevin-tan]

See docs: https://pandas-datareader.readthedocs.io/en/latest/remote_data.html?highlight=yahoo#

[kevin-tan]

Consider using the following websites for their API:

• IEX (max historical data up to past 5 years)
• Morningstar (not sure about how far it can go)
• OECD (interesting)
• MOEX Data (interesting)