Bump js-yaml from 3.14.1 to 4.0.0

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 3.14.1 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](https://github.com/nodeca/js-yaml/compare/3.14.1...4.0.0)

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

package.json

@@ -92,7 +92,7 @@
     "gaze": "^1.1.3",
     "glob": "^7.1.0",
     "happen": "^0.3.1",
-    "js-yaml": "^3.14.0",
+    "js-yaml": "^4.0.0",
     "json-stringify-pretty-compact": "^2.0.0",
     "mapillary-js": "~3.0.0",
     "mapillary_sprite_source": "^1.8.0",