missing query parameters for URL used in MailingList list_lists()

[brycegrier]

List_lists() returns a DataFrame with various parameters for the mailings lists. The parameter "contactCount" always returns 0 for every entry though. This appears to be due to a query parameter called "includeCount" which evidently defaults to false. Setting this paramter to true in the request URL yields correct values in the "contactCount" column.

https://api.qualtrics.com/dd83f1535056c-list-mailing-lists#Query-Parameters