Bump handlebars from 4.0.11 to 4.7.7

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.0.11 to 4.7.7.
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/master/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.0.11...v4.7.7)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "gulp-inline-source": "^3.2.0",
     "gulp-replace": "^1.0.0",
     "gulp-smoosher": "0.0.9",
-    "handlebars": "^4.0.11",
+    "handlebars": "^4.7.7",
     "joi": "^9.0.4",
     "jsonwebtoken": "^8.0.1",
     "jwks-rsa": "^1.2.1",