[Snyk] Upgrade mustache from 2.2.1 to 4.0.1#3

snyk-bot wants to merge 1 commit intomasterthebpc/haven:masterfrom

snyk-upgrade-42068a33c961320dc3247399c214359dthebpc/haven:snyk-upgrade-42068a33c961320dc3247399c214359dCopy head branch name to clipboard