Prepare Release for 0.3.0

[skorfmann]

Breaking Changes

We're now supporting multiple Stacks! - existing Terraform state files from local Terraform workflows have to be renamed to match the stack name.

Up until CDK for Terraform version 0.2 only a single stack was supported. For local state handling, a terraform.tfstate file in the project root folder was used. With version 0.3.0 the local state file reflects the stack name it belongs to in its file name. When a terraform.tfstate file is still present in the project root folder, it has to be renamed to match the schema terraform.<stack-name>.tfstate manually.

Implemented enhancements:

• Add support for remote templates #645
• Handle Multiple Stacks #636

Fixed Bugs

• Wait for ConfigurationVersion to be ready when using Terraform Cloud #655
• Fix module variables without type #630
• Fix module without newline #633
• Rename instance variable to a more specific name to avoid name collisions #640
• Fix multiple modules with same end name #637

[skorfmann]

This is waiting for #636 to be merged

[skorfmann]

This is waiting for #636 to be merged

Done

[github-actions]

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