[Snyk] Upgrade express-handlebars from 3.1.0 to 6.0.6#26

ukmadlz wants to merge 1 commit intomasteribm-watson-data-lab/npmjs-download-stats:masterfrom

snyk-upgrade-f14dd7ba726e899f0224aba8cb6d0da1ibm-watson-data-lab/npmjs-download-stats:snyk-upgrade-f14dd7ba726e899f0224aba8cb6d0da1Copy head branch name to clipboard