v1.4.1

1.4.1 (2016-12-01)

Bug Fixes

• findByIds: Allowed to be id of any type (0b981f7d, closes #4)

According to the MongoDB documentation _id field can be of any type:
"The field name _id is reserved for use as a primary key; its value must be unique in the collection, is immutable, and may be of any type other than an array."

Thanks @unkleho for his great first PR 🎉