The fields with null value just disappear in the output

[semihbkgr]

Describe the bug

Fields with a value of null are not available in the output.

To Reproduce

actual data

{
  "a": "alice",
  "b": null,
  "c": [
    {
      "d": 9,
      "e": null
    }
  ]
}

$ dasel -r json -f data.json

actual output:

{
  "a": "alice",
  "c": [
    {
      "d": 9
    }
  ]
}

expected output:

{
  "a": "alice",
  "b": null,
  "c": [
    {
      "d": 9,
      "e": null
    }
  ]
}

[TomWright]

This has been fixed in the development version. Fix will be included in the next release.

$ echo '{
  "a": "alice",
  "b": null,
  "c": [
    {
      "d": 9,
      "e": null
    }
  ]
}' | go run cmd/dasel/main.go -r json
{
  "a": "alice",
  "b": null,
  "c": [
    {
      "d": 9,
      "e": null
    }
  ]
}