Bump engine.io and browser-sync in /JavaScript/1. ES2015-examples#27

dependabot[bot] wants to merge 1 commit intomasterjstobigdata/code:masterfrom

dependabot/npm_and_yarn/JavaScript/1.-ES2015-examples/engine.io-and-browser-sync-6.2.1jstobigdata/code:dependabot/npm_and_yarn/JavaScript/1.-ES2015-examples/engine.io-and-browser-sync-6.2.1Copy head branch name to clipboard