Gems4 mandrill-api 1.0.55 8,866,408 April 01, 2021 mailchimp-api 2.0.7 5,697,573 April 01, 2021 MailchimpMarketing 3.0.80 3,705,806 November 02, 2022 MailchimpTransactional 1.4.1 3,374,796 March 24, 2026