Bump js-yaml from 3.12.0 to 3.13.1

[dependabot[bot]]

Bumps js-yaml from 3.12.0 to 3.13.1.

Changelog

*Sourced from [js-yaml's changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md).* > ## [3.13.1] - 2019-04-05 > ### Security > - Fix possible code execution in (already unsafe) `.load()`, [#480](https://github-redirect.dependabot.com/nodeca/js-yaml/issues/480). > > > ## [3.13.0] - 2019-03-20 > ### Security > - Security fix: `safeLoad()` can hang when arrays with nested refs > used as key. Now throws exception for nested arrays. [#475](https://github-redirect.dependabot.com/nodeca/js-yaml/issues/475). > > > ## [3.12.2] - 2019-02-26 > ### Fixed > - Fix `noArrayIndent` option for root level, [#468](https://github-redirect.dependabot.com/nodeca/js-yaml/issues/468). > > > ## [3.12.1] - 2019-01-05 > ### Added > - Added `noArrayIndent` option, [#432](https://github-redirect.dependabot.com/nodeca/js-yaml/issues/432).

Commits

- [`665aadd`](https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da) 3.13.1 released - [`da8ecf2`](https://github.com/nodeca/js-yaml/commit/da8ecf24b63d2307015e75ee8bd1da1977071e35) Browser files rebuild - [`b2f9e88`](https://github.com/nodeca/js-yaml/commit/b2f9e882397660da37c5c5bb92e8ccc7bb9eb668) Merge pull request [#480](https://github-redirect.dependabot.com/nodeca/js-yaml/issues/480) from nodeca/toString - [`e18afbf`](https://github.com/nodeca/js-yaml/commit/e18afbf1edcafb7add2c4c7b22abc8d6ebc2fa61) Fix possible code execution in (already unsafe) load() - [`9d4ce5e`](https://github.com/nodeca/js-yaml/commit/9d4ce5e2895365c943d2bdf7e7c8ac1be3ec51a3) 3.13.0 released - [`f64c673`](https://github.com/nodeca/js-yaml/commit/f64c6737dbe24d110f53152d142d01e64520a193) Browser files rebuild - [`a567ef3`](https://github.com/nodeca/js-yaml/commit/a567ef3c6e61eb319f0bfc2671d91061afb01235) Restrict data types for object keys - [`59b6e76`](https://github.com/nodeca/js-yaml/commit/59b6e76b712350e9e6aad7773e7375a1de009cf9) Fix test name - [`e4267fc`](https://github.com/nodeca/js-yaml/commit/e4267fc733452d074a3e494fb5cab2a07c7e6b87) 3.12.2 released - [`7231a49`](https://github.com/nodeca/js-yaml/commit/7231a491788ecb289cee52e854574e7271c34350) Browser files rebuild - Additional commits viewable in [compare view](https://github.com/nodeca/js-yaml/compare/3.12.0...3.13.1)

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[timmyers]

@dependabot rebase

[dependabot[bot]]

Looks like js-yaml is up-to-date now, so this is no longer needed.