build(deps-dev): bump eslint from 7.30.0 to 7.31.0 (aws-powertools#118)

Bumps [eslint](https://github.com/eslint/eslint) from 7.30.0 to 7.31.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v7.30.0...v7.31.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]