Bump minimist, mkdirp and npm in /demos/rxjs-ngzone-angular6#578

dependabot[bot] wants to merge 1 commit intomasterbennadel/JavaScript-Demos:masterfrom

dependabot/npm_and_yarn/demos/rxjs-ngzone-angular6/minimist-and-mkdirp-and-npm-1.2.8bennadel/JavaScript-Demos:dependabot/npm_and_yarn/demos/rxjs-ngzone-angular6/minimist-and-mkdirp-and-npm-1.2.8Copy head branch name to clipboard