Gems4 mandrill-api 1.0.55 8,863,970 April 01, 2021 mailchimp-api 2.0.7 5,695,238 April 01, 2021 MailchimpMarketing 3.0.80 3,694,354 November 02, 2022 MailchimpTransactional 1.4.1 3,369,097 March 24, 2026