Bump js-yaml from 3.10.0 to 3.13.1 (#120)

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.10.0 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](nodeca/js-yaml@3.10.0...3.13.1)

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