Throws when created for 0 elements

[golergka]

Steps to reproduce

import BloomFilter from 'bloom-filter'

BloomFilter.create(0, 0.01)

Expected behaviour

Doesn't throw an error

Actual behaviour

TypeError: Data object should include number of hash functions "nHashFuncs"

Comments

I automatically created bloom filters for set arrays of elements. Sometimes these arrays are empty. It would be nice to handle this edge case without any special logic.