build(deps-dev): bump eslint-plugin-jest from 23.8.2 to 23.20.0 (#18)

Bumps [eslint-plugin-jest](https://github.com/jest-community/eslint-plugin-jest) from 23.8.2 to 23.20.0.
- [Release notes](https://github.com/jest-community/eslint-plugin-jest/releases)
- [Changelog](https://github.com/jest-community/eslint-plugin-jest/blob/master/CHANGELOG.md)
- [Commits](jest-community/eslint-plugin-jest@v23.8.2...v23.20.0)

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Author: dependabot[bot]