Bump express-handlebars from 3.1.0 to 5.3.1

Bumps [express-handlebars](https://github.com/express-handlebars/express-handlebars) from 3.1.0 to 5.3.1.
- [Release notes](https://github.com/express-handlebars/express-handlebars/releases)
- [Changelog](https://github.com/express-handlebars/express-handlebars/blob/master/CHANGELOG.md)
- [Commits](express-handlebars/express-handlebars@v3.1.0...v5.3.1)

---
updated-dependencies:
- dependency-name: express-handlebars
  dependency-type: direct:production
...

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

package.json

@@ -24,7 +24,7 @@
     "cookie-parser": "^1.4.5",
     "dyslexic-charactersheets": "^1.7.1",
     "express": "^4.17.1",
-    "express-handlebars": "^3.1.0",
+    "express-handlebars": "^5.3.1",
     "file": "^0.2.2",
     "hbs": "^4.1.2",
     "js-yaml": "^3.14.1",