0.22.0: Support 0.13

[AUTOMATED] Update Version Pinning for Terraform to support 0.13 (#61)

## What

1. Update Version Pinning for Terraform to support 0.13

## Why

1. This is a relatively minor update that the CloudPosse module already likely supports.
1. This allows module consumers to not individually update our Terraform module to support Terraform 0.13.