v0.22.0

Adds *_hostname_enabled vars for explicit opt-in to hostnames @Gowiem (#73)

what

• Adds domain_hostname_enabled and kibana_hostname_enabled var flags to fix an issues with count when dns_zone_id is not being passed static.

why

• Implicit opt-in through checking dns_zone_id was causing folks problems as count / enabled need to be calculated during the plan which caused using -target.
• This fixes needing a targeted apply when passing dns_zone_id from a resource or module reference.

references

• Fixes + Closes #13
• Discussion in SweetOps: https://sweetops.slack.com/archives/CB6GHNLG0/p1600294860394500