Bump mongoose from 5.1.6 to 5.6.6#31

dependabot-preview[bot] wants to merge 1 commit intomastercsymlstd/expresskit:masterfrom

dependabot/npm_and_yarn/mongoose-5.6.6csymlstd/expresskit:dependabot/npm_and_yarn/mongoose-5.6.6Copy head branch name to clipboard