Bump mustache from 3.2.1 to 4.0.1

Bumps [mustache](https://github.com/janl/mustache.js) from 3.2.1 to 4.0.1.
- [Release notes](https://github.com/janl/mustache.js/releases)
- [Changelog](https://github.com/janl/mustache.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/janl/mustache.js/compare/v3.2.1...v4.0.1)

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

package.json

@@ -56,7 +56,7 @@
     "glob": "^7.0.5",
     "jsdom": "^16.2.2",
     "mocha": "^7.1.1",
-    "mustache": "^3.0.1",
+    "mustache": "^4.0.1",
     "node-pty": "^0.9.0",
     "nyc": "^15.0.0",
     "playwright-core": "^0.11.1",