[Snyk] Security upgrade express from 4.18.2 to 4.21.1#10

jtwebman wants to merge 1 commit intomasterjtwebman/node-express-postgres-docker-todo:masterfrom

snyk-fix-3ba9fdeaed97166313680554eba68209jtwebman/node-express-postgres-docker-todo:snyk-fix-3ba9fdeaed97166313680554eba68209Copy head branch name to clipboard