Bump flat, gulp-mocha and mocha in /js#2

dependabot[bot] wants to merge 1 commit intomasterbstephgit/algos:masterfrom

dependabot/npm_and_yarn/js/flat-and-gulp-mocha-and-mocha-5.0.2bstephgit/algos:dependabot/npm_and_yarn/js/flat-and-gulp-mocha-and-mocha-5.0.2Copy head branch name to clipboard