Bump mongoose from 5.1.6 to 5.6.4#24

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

dependabot/npm_and_yarn/mongoose-5.6.4csymlstd/expresskit:dependabot/npm_and_yarn/mongoose-5.6.4Copy head branch name to clipboard