RichMessageAnnouncer v1.3.2

Fix error occuring when there isn't any messages to announce

RichMessageAnnouncer v1.3.1

Fix null reference error when iconUrl is not set

RichMessageAnnouncer v1.3.0

Add variables and messages shuffle option

RichMessageAnnouncer v1.2.0

Add JoinLink option

RichMessageAnnouncer v1.1.0

Update default configuration and improve /commands command

RichMessageAnnouncer v1.0.0

add github workflow file