[Snyk] Security upgrade express from 4.9.8 to 4.21.2#38

Bhanditz wants to merge 1 commit intomasterBhanditz/socket.io:masterfrom

snyk-fix-01396fb456ac8ee5d4ed966d3c8f1bd4Bhanditz/socket.io:snyk-fix-01396fb456ac8ee5d4ed966d3c8f1bd4Copy head branch name to clipboard