Fix complexity of `aeq.select`

[Remco Janssen]

Warning: 80:14 warning Function has a complexity of 38 complexity

See: https://bitbucket.org/motiondesign/aequery/src/4fa3668468d17139f7f52924a7b0a4c325842c71/lib/select.js?fileviewer=file-view-default#select.js-80