Update dependency express-handlebars to v8

Author: renovate[bot]

package.json

@@ -21,7 +21,7 @@
     "ejs-locals": "^1.0.2",
     "express": "^4.16.3",
     "express-fileupload": "^1.1.6",
-    "express-handlebars": "^6.0.0",
+    "express-handlebars": "^8.0.0",
     "express-session": "^1.17.0",
     "faker": "^6.0.0",
     "fs": "0.0.2",