[Snyk] Security upgrade express from 3.4.8 to 4.0.0#18

tjenkinson wants to merge 1 commit intomastertjenkinson/socket.io:masterfrom

snyk-fix-f35c2bcaf5afcc8dfaf4b4a5ae117080tjenkinson/socket.io:snyk-fix-f35c2bcaf5afcc8dfaf4b4a5ae117080Copy head branch name to clipboard