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

@@ -6,7 +6,7 @@
   "dependencies": {
     "bootstrap": "^4.5.3",
     "jquery": "^3.5.0",
-    "js-yaml": "3.14.1",
+    "js-yaml": "4.0.0",
     "popper.js": "^1.16.1"
   },
   "devDependencies": {