[Snyk] Upgrade express from 4.7.3 to 4.21.2#2

zg-appsec wants to merge 1 commit intomasterzillow/combohandler:masterfrom

snyk-upgrade-d180cb867c4cb7a846556ee0f7cb6dbezillow/combohandler:snyk-upgrade-d180cb867c4cb7a846556ee0f7cb6dbeCopy head branch name to clipboard