MailWizz - Email Marketing Application 2.6.2

[RMV] - Removed unused libraries from composer.json
[CHG] - We're no longer using Queue Tables for Autoresponders + Segments. More at We're thinking to remove the Queue Tables feature
[MSC] - Overall fixes
[UPD] - Updated composer packages

[ENH] - The send-transactional-emails command now makes use of PCNTL for faster processing
[ADD] - Added select2 for selects with multiple items to ease finding the desired select value(s)
[ADD] - Added DMARC record suggestion for sending domains

[ADD] - Add [SUBSCRIBE_URL] and [SUBSCRIBE_LINK] tags
[ENH] - Better handling for campaigns that use timewarp
[MSC] - Overall fixes
[UPD] - Updated composer packages