chore!: increase minimum supported Node.js version to 20 (#1022)

This PR increases the minimum supported Node.js version to `20.9.0` from
`18.12.0` because version 18.12.0 is less than 30 days away from EOL.

While this PR could be merged as-is, it is recommended that you scan the
code (especially `.projenrc.ts`) to see if there are any comments
indicating changes that can/should be made when upgrading Node, such as:
```// The following line can be removed when upgrading to Node 20```

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Signed-off-by: team-tf-cdk <[email protected]>
Co-authored-by: Nara Kasbergen <[email protected]>

chore(deps): upgrade jsii & typescript to v5.7 (#1068)

This PR increases the version of JSII and TypeScript to `~5.7.0` because
the previous version is close to EOL or no longer supported. Support
timeline:
https://github.com/aws/jsii-compiler/blob/main/README.md#gear-maintenance--support

Signed-off-by: team-tf-cdk <[email protected]>

chore(deps): upgrade dependencies (#1046)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]:
https://github.com/hashicorp/cdktf-aws-cdk/actions/runs/14698823662

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*Automatically created by projen via the "upgrade-main" workflow*

Signed-off-by: team-tf-cdk <[email protected]>

chore(deps): upgrade dependencies (#1043)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]:
https://github.com/hashicorp/cdktf-aws-cdk/actions/runs/14565884081

------

*Automatically created by projen via the "upgrade-main" workflow*

Signed-off-by: team-tf-cdk <[email protected]>

chore(deps): upgrade jsii & typescript to v5.6 (#1032)

This PR increases the version of JSII and TypeScript to `~5.6.0` because
the previous version is close to EOL or no longer supported. Support
timeline:
https://github.com/aws/jsii-compiler/blob/main/README.md#gear-maintenance--support

Signed-off-by: team-tf-cdk <[email protected]>

chore(deps): upgrade dependencies (#1029)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]:
https://github.com/hashicorp/cdktf-aws-cdk/actions/runs/14436001725

------

*Automatically created by projen via the "upgrade-main" workflow*

Signed-off-by: team-tf-cdk <[email protected]>

chore(deps): upgrade dependencies (#1026)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]:
https://github.com/hashicorp/cdktf-aws-cdk/actions/runs/14299335291

------

*Automatically created by projen via the "upgrade-main" workflow*

Signed-off-by: team-tf-cdk <[email protected]>

chore(ci): remove unnecessary compile step from workflow (#1023)

chore(ci): add setup-terraform step to fix broken workflows (#1021)

Also upgrades pinned GitHub Actions to the latest versions.

chore(deps): upgrade dependencies (#1018)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]:
https://github.com/hashicorp/cdktf-aws-cdk/actions/runs/14162644829

------

*Automatically created by projen via the "upgrade-main" workflow*

Signed-off-by: team-tf-cdk <[email protected]>