Typo: breaking package.json

Sorry folks, I've merged/pushed something I shouldn't have. Please accept this PR or bundle/test fails via npm.

TL;DR

The npm-dollar by default joins arrays via && so that it instantly exit execution if something goes wrong.

However, to have multiple line joined by spaces, which is somehow the equivalent of a comma in JS, and avoid kilometric lines, you need double brackets.

This is explained in the module but I've messed up a previous merge.

Thanks for fixing this.