using('<path>').update(...) crashes with "TypeError: updater.apply is not a function"

[nlepage]

Description

using('<path>').update(...) crashes with TypeError: updater.apply is not a function

Version : 0.2.0

Expected behavior

Call updater with the '<path>' argument.

Actual behavior

'<path>' argument is used as the updater.

How to reproduce

    const input = {
      pages: [1, 2, 3],
      selectedPages: [4, 5, 6],
    }
    const output = using('pages').update(input, 'selectedPages', (selectedPages, pages) => pages.map(page => page * 2))
    expect(output).toEqual({
      pages: [1, 2, 3],
      selectedPages: [2, 4, 6],
    })