Bump express from 4.17.1 to 4.20.0 in /virtual-device#20

dependabot[bot] wants to merge 1 commit intomastergoogle-home/smarthome-local:masterfrom

dependabot/npm_and_yarn/virtual-device/express-4.20.0google-home/smarthome-local:dependabot/npm_and_yarn/virtual-device/express-4.20.0Copy head branch name to clipboard