Bump js-yaml from 3.7.0 to 3.13.1

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.7.0 to 3.13.1.
- [Release notes](https://github.com/nodeca/js-yaml/releases)
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodeca/js-yaml/compare/3.7.0...3.13.1

)

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