mapFrom does not call its mapper

[Kui-kui]

Hello WaldoJeffers 👋

When I use mapFrom, the key I apply it on ends up undefined as if the mapper was never called.
By the way, the last test here is skipped 🙈

[WaldoJeffers]

It's actually more of a documentation issue following the release of v2.
The mapper function provided mapFrom will be called with a single value if a single string was passed as the first argument, or as an array if the first argument to mapFrom was an array.
Should be fixed by 3bc8fad
Can we close this?

Valid in v2 ✅

import { transform, mapFrom } from '@waldojeffers/transformer'

const input = { firstName: 'Waldo', lastName: 'Jeffers' }
const transformer = transform({
  fullName: mapFrom(['firstName', 'lastName'], arr => arr.join(' ')),
  firstname: mapFrom('firstName', str => str.toLowerCase())
})

Invalid in v2 ❌

import { transform, mapFrom } from '@waldojeffers/transformer'

const input = { firstName: 'Waldo', lastName: 'Jeffers' }
const transformer = transform({
  fullName: mapFrom(['firstName', 'lastName'], (a, b) => a + ' ' + b),
  names: mapFrom(['firstName', 'lastName'], ({firstName, lastName}) => firstName + ' ' + lastName),
})