README seems outdated re: source of disposable emails

[daisy1754]

README says disposable emails are from https://github.com/disposable/disposable but by looking at update.sh it seems it's coming from https://github.com/ivolo/disposable-email-domains

Can you confirm README is outdated? Also I'm curious about reasoning behind switch :)

[lryong]

Yes, README documentation is incorrectly referencing the source of disposable emails. The disposable dataset is now updated from ivolo/disposable-email-domains

Maybe we posted the wrong reference link when we wrote README which referred to multiple other data sources.

update.sh refers to freemail.