[modifier] Boolean modifier

[CodingCarlos]

A boolean modifier, that turns into true/false javascript truly and falsy values.

Example:
Transform

{
  trulyNum: 1,
  trulyStr: 'something',
  falsyNum: 0,
  falsyStr: '',
}

Into

{
  trulyNum: true,
  trulyStr: true,
  falsyNum: false,
  falsyStr: false,
}