Bump express from 4.15.4 to 4.21.2#886

dependabot[bot] wants to merge 1 commit intomainShopify/buy-button-js:mainfrom

dependabot/npm_and_yarn/express-4.21.2Shopify/buy-button-js:dependabot/npm_and_yarn/express-4.21.2Copy head branch name to clipboard