Bump minimist, mkdirp and handlebars in /user_welcome_message#4

dependabot[bot] wants to merge 1 commit intomastervijaykumaringle/SharePoint-Framework-SPFx:masterfrom

dependabot/npm_and_yarn/user_welcome_message/minimist-and-mkdirp-and-handlebars-1.2.8vijaykumaringle/SharePoint-Framework-SPFx:dependabot/npm_and_yarn/user_welcome_message/minimist-and-mkdirp-and-handlebars-1.2.8Copy head branch name to clipboard