New adapter for SendinBlue api v. 3.0

Thanks to @icappello 🥇 we've got a brand new adapter for SendinBlue api v. 3.0

Attachments support

Thanks to @icappello for attachment support and multiple recipients fix.

Bamboo 1.x support

This is an attempt to support Bamboo 1.x

Note
I've merely update library dependecies and checked running tests.

Initial support for SendinBlue mail service

A SendinBlue adapter for Bamboo