Bump engine.io and browser-sync in /truffle/tokentutorial#22

dependabot[bot] wants to merge 1 commit intomasterajlopez/SoliditySamples:masterfrom

dependabot/npm_and_yarn/truffle/tokentutorial/engine.io-and-browser-sync-6.2.1ajlopez/SoliditySamples:dependabot/npm_and_yarn/truffle/tokentutorial/engine.io-and-browser-sync-6.2.1Copy head branch name to clipboard