Breaking changes released as a patch release

[chrisPTheMagCoder]

Version 1.6.7 contains breaking changes that should not really be in a patch release, was this intentional?

[nadar]

@chrisPTheMagCoder they dont care at all, i report that already one month ago

• in issue: Let the end user choose the HTTP Client to use #329 (comment)
• in PR: issue link https://github.com/mailjet/mailjet-apiv3-php/issues/329: #330 (comment)