Bump express from 2.5.11 to 4.17.1 in /2015-05-27-gdg-global-summit/slides#2

dependabot[bot] wants to merge 1 commit intomasterjwngr/presentations:masterfrom

dependabot/npm_and_yarn/2015-05-27-gdg-global-summit/slides/express-4.17.1jwngr/presentations:dependabot/npm_and_yarn/2015-05-27-gdg-global-summit/slides/express-4.17.1Copy head branch name to clipboard