Bump minimist, @microsoft/sp-build-web, @microsoft/sp-webpart-workbench and mkdirp in /solutions/sp2019-capabilities#584

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dependabot/npm_and_yarn/solutions/sp2019-capabilities/minimist-and-microsoft/sp-build-web-and-microsoft/sp-webpart-workbench-and-mkdirp-1.2.8pnp/sp-dev-solutions:dependabot/npm_and_yarn/solutions/sp2019-capabilities/minimist-and-microsoft/sp-build-web-and-microsoft/sp-webpart-workbench-and-mkdirp-1.2.8Copy head branch name to clipboard