chore(deps-dev): bump js-yaml from 3.13.1 to 4.0.0

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.13.1 to 4.0.0.
- [Release notes](https://github.com/nodeca/js-yaml/releases)
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](nodeca/js-yaml@3.13.1...4.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -34,7 +34,7 @@
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
     "coveralls": "^3.0.2",
-    "js-yaml": "^3.13.1",
+    "js-yaml": "^4.0.0",
     "mocha": "^7.0.1",
     "nyc": "^15.0.0",
     "prettier": "^2.0.0",