id: no-accumulating-spread-js
valid:
  - 'arr.reduce((acc, item) => { acc.push(item); return acc }, [])'
  - 'arr.flatMap(item => [item])'
invalid:
  - 'arr.reduce((acc, item) => [...acc, item], [])'
  - 'arr.reduce((acc, item) => [...acc, ...item], [])'
  - 'arr.reduce(function (acc, item) { return [...acc, item] }, [])'