Optimise clean function perf

Cool lib!

What about

const clense = (a, b) => {
  b && a.push.apply(a, b)
  return a
}

or maybe?

const clense = (a, b) => {
  b && a.push.apply(a, [b])
  return a
}

to save some memory via mutating?

[lukejacksonn]

Hahaa, I am a small way through implementing these… in Tead like @okwolf suggested! There is only a simple set to start off with. I will push them up after work this evening.

[lukejacksonn]

@okwolf https://github.com/lukejacksonn/ijk/pull/5