build(deps): bump aws-sdk from 2.1152.0 to 2.1156.0 (#976)

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.1152.0 to 2.1156.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](aws/aws-sdk-js@v2.1152.0...v2.1156.0)

---
updated-dependencies:
- dependency-name: aws-sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]