[Idea] Multiline support

[abdelrahmanrafaat]

Hello Alexander,
The current MentionInput does not treat new lines added by pressing Enter as new lines, it only accepts new lines by pressing Shift + Enter, even though the input field gets streched when pressing Enter which gives the illusion that a new line was added.

Thanks in advance.

[Alexanderdunlop]

Fixing now

[Alexanderdunlop]

Fixed in #68 publishing a new version shortly