[Snyk] Security upgrade pg from 4.2.0 to 4.5.7#2

jeffsnyk wants to merge 1 commit intomasterjeffandersen/node-express-sample:masterfrom

snyk-fix-b2ec51f2fb11a24f25a09beabced1c36jeffandersen/node-express-sample:snyk-fix-b2ec51f2fb11a24f25a09beabced1c36Copy head branch name to clipboard