v2.2.0

Fix and update variables and inputs @aknysh (#90)

what

• Fix and update variables and inputs
• Bump Go to 1.20 in terratest

why

• Remove unused (deprecated) variables
• Use all the variables that are declared
• Add missing outputs
• Fix output types and descriptions
• Fix the tflint errors:

WARNING: "tflint FILE/DIR" is deprecated and will error in a future version. Use --chdir or --filter instead.
  reviewdog: input data has violations
  security-group-variables.tf:146:1: warning: variable "allow_all_egress" is declared but not used ()
  security-group-variables.tf:202:1: warning: variable "inline_rules_enabled" is declared but not used ()
  security-group-variables.tf:212:1: warning: variable "revoke_security_group_rules_on_delete" is declared but not used ()
  security-group-variables.tf:[66](https://github.com/cloudposse/terraform-aws-msk-apache-kafka-cluster/actions/runs/5006279988/jobs/8971794698#step:6:74):1: warning: variable "allowed_ipv6_cidr_blocks" is declared but not used ()
  security-group-variables.tf:75:1: warning: variable "allowed_ipv6_prefix_list_ids" is declared but not used ()
  variables-deprecated.tf:1:1: warning: variable "security_groups" is declared but not used ()

Facilitate error-free MSK upgrades @gkramer-gloat (#86)

what

This change adds support for MSK upgrades.

why

Necessary to support MSK upgrades, rather than destroying and recreating the cluster (which was previously the case).

references

Sync github @max-lobur (#89)

Rebuild github dir from the template