Issues with `gulpfile.babel.js`

[mikeerickson]

My gulpfile is actually gulpfile.babel.js and causes an issue when defaults are used

This produces error

let files = ['tasks/lint.js'];  // if this is not supplied, things get wonky
require('gulp-task-list')(gulp);

However, if I point to one of my tasks files, then all works fine.

let files = ['tasks/lint.js'];  // if this is not supplied, things get wonky
require('gulp-task-list')(gulp, null, files);