Release 0.0.24.

Closes #144.

File                             Raw         Min         Zip     Min/Zip
index.js                 16153/15.77  5483/05.35  3590/03.51  2018/01.97
Merge branch `release-0.0.24` into `master`.

File                             Raw         Min         Zip     Min/Zip
index.js                 16153/15.77  5483/05.35  3590/03.51  2018/01.97