Make `_.sortBy` move`undefined` and `NaN` to the end of the array.
Update tested version of Firefox in readme. [ci skip]
Add test for `_.sortBy` sorting `undefined` and `NaN` values.
Add support for Sauce reports to qunit-extras.
Use a string of keywords in package.json.
Change `name` to `user` in docs and tests to avoid `this.name`.
Realign `baseSortedIndex` with `_.sortBy`.