Gems4 mandrill-api 1.0.55 8,900,640 April 01, 2021 mailchimp-api 2.0.7 5,730,561 April 01, 2021 MailchimpMarketing 3.0.80 3,878,373 November 02, 2022 MailchimpTransactional 1.4.1 3,449,921 March 24, 2026