feat: add single_level query parameter support for Folders list endpoint#527

AaronDDM merged 2 commits intomainnylas/nylas-ruby:mainfrom

TW-3956-add-sdk-support-for-the-new-single-level-folders-endpoint-query-paramnylas/nylas-ruby:TW-3956-add-sdk-support-for-the-new-single-level-folders-endpoint-query-paramCopy head branch name to clipboard