Update outputs + docs (umotif-public#9)

Add support for clustered mode and upgrade fixes (umotif-public#8)

Add self sg ingress rule option (umotif-public#7)

Update module to remove 0.14 limit (umotif-public#6)

Update main.tf

Feature/v3 provider support (umotif-public#4)

* Update module versions to support v3 provider

* update CHANGELOG

improve typing (umotif-public#1)

automatic failover cannot be enabled if nodes < 2 to safeguard against misconfiguration

add support for custom sg and notification_topic_arn

add redis configuration