Bump jszip and grunt-zip in /reveal.js-3.9.2#21

dependabot[bot] wants to merge 1 commit intomasternickanderson/cfengine-training:masterfrom

dependabot/npm_and_yarn/reveal.js-3.9.2/jszip-and-grunt-zip-2.7.0nickanderson/cfengine-training:dependabot/npm_and_yarn/reveal.js-3.9.2/jszip-and-grunt-zip-2.7.0Copy head branch name to clipboard