Bump js-yaml from 3.12.2 to 3.13.1 (#35)

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.12.2 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@3.12.2...3.13.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

yarn.lock

@@ -4499,8 +4499,8 @@ jest@^24.5.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
 
 js-yaml@^3.12.0, js-yaml@^3.9.0:
-  version "3.12.2"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.2.tgz#ef1d067c5a9d9cb65bd72f285b5d8105c77f14fc"
+  version "3.13.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"