Bump xml2js, @microsoft/sp-build-web and @microsoft/sp-webpart-workbench in /multitab-spfx-teamssolution#4

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dependabot/npm_and_yarn/multitab-spfx-teamssolution/xml2js-and-microsoft/sp-build-web-and-microsoft/sp-webpart-workbench-0.5.0jenkinsns/MSTeamsSolutionDevelopment:dependabot/npm_and_yarn/multitab-spfx-teamssolution/xml2js-and-microsoft/sp-build-web-and-microsoft/sp-webpart-workbench-0.5.0Copy head branch name to clipboard