Update to MailChimp API v3

[psysm]

This bundle relies on https://github.com/zf-fr/zfr-mailchimp which implements MailChimp API version 2.0. According to MailChimp, API version 2.0 will be deprecated by the end of 2016:
"Prior versions will no longer be supported after 2016, so all API users should begin transitioning to v3.0. Check out the API v3.0 Documentation for more details. http://developer.mailchimp.com/documentation/mailchimp/?utm_source=apidocs&utm_medium=internal_ad&utm_campaign=api_v3"

Unfortunately it's unlikely that zfr-mailchimp will make the switch: zf-fr/zfr-mailchimp#25

Until now, MailChimp still doesn't recommend any wrapper for API version 3.0 on their downloads page: https://apidocs.mailchimp.com/api/downloads/ (for none of the given languages)

According to comments at https://devs.mailchimp.com/blog/api-v3-0-officially-launched/ some are working on wrappers for API version 3.0:
https://github.com/vatps/mailchimp-rest-api

Moreover I found: https://github.com/pacely/mailchimp-api-v3 which seems to be a little more active than vatps/mailchimp-rest-api.

Pete Holiday from MailChimp stated in 2015 "We do plan to release a wrapper for Python (and Ruby and PHP and Node.js) but we don’t have an ETA for that yet." without any updates, yet.

Any ideas how to solve this? It's less than 4 weeks :/

[DimaSoroka]

We submitted a few clarification requests to MailChimp support and will provide updates here once will get answers.

[DimaSoroka]

Just got an answer form the support team:

After December 31st, the documentation for all versions of the API prior to 3.0 will be removed from the site and our team will no longer be supporting those versions. They will not stop working immediately, but we do intend to turn them off completely at some point in 2017.

We are planning to upgrade this extension in Q1 2017 and enable V3 support

[psysm]

We are planning to upgrade this extension in Q1 2017 and enable V3 support

Sounds great! Any updates on this one?

[artml]

@psysm we had to de-prioritize this update and currently have no ETA on it.

[psysm]

Today I got an email from Mailchimp stating, that TLS support for TLS versions 1.0 and 1.1 will be retired on May 31, 2018. Although it's related to API V3 (see https://developer.mailchimp.com/documentation/mailchimp/guides/get-started-with-mailchimp-api-3/#tls-1-0-and-1-1-deprecation), according to the source, it sounds like this would affect API V2 as well, as it's on host/server level. Can somebody confirm? Do you think we should patch this bundle?