build(deps-dev): bump @aws-cdk/core from 1.137.0 to 1.138.0 (#433)

Bumps [@aws-cdk/core](https://github.com/aws/aws-cdk/tree/HEAD/packages/@aws-cdk/core) from 1.137.0 to 1.138.0.
- [Release notes](https://github.com/aws/aws-cdk/releases)
- [Changelog](https://github.com/aws/aws-cdk/blob/master/allowed-breaking-changes.txt)
- [Commits](https://github.com/aws/aws-cdk/commits/v1.138.0/packages/@aws-cdk/core)

---
updated-dependencies:
- dependency-name: "@aws-cdk/core"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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