Bump handlebars from 4.1.2 to 4.3.0 (#40)

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.1.2 to 4.3.0.
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/wycats/handlebars.js/blob/master/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.1.2...v4.3.0)

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

package.json

@@ -31,7 +31,7 @@
     "express-session": "1.15.6",
     "express-winston": "2.6.0",
     "frontexpress": "1.2.1",
-    "handlebars": "4.1.2",
+    "handlebars": "4.3.0",
     "i18next": "14.0.1",
     "i18next-browser-languagedetector": "2.2.4",
     "i18next-express-middleware": "1.7.1",