Proxy rotations as parameter for scraping pyETFDB

[lvxhnat]

Is your feature request related to a problem? Please describe.

ETFDB blocks a user who has been requesting tickers after 200-300 repetitive requests.

Describe the solution you'd like

There should be a parameter in the ETF object to allow a proxy and user agent to be passed in, so the user can perform proxy rotations as they like.

Describe alternatives you've considered

Additional context