Bump js-yaml from 3.12.0 to 3.12.1

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.12.0 to 3.12.1.
- [Release notes](https://github.com/nodeca/js-yaml/releases)
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](nodeca/js-yaml@3.12.0...3.12.1)

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

Author: dependabot-support

package-lock.json

@@ -31,7 +31,7 @@
     "gatsby-transformer-remark": "^1.7.44",
     "github-slugger": "^1.2.1",
     "glamor": "^2.20.40",
-    "js-yaml": "^3.12.0",
+    "js-yaml": "^3.12.1",
     "microfeedback-button": "^1.0.1",
     "prismjs": "^1.15.0",
     "prop-types": "^15.6.2",