Fixes the missing null values in the output

[semihbkgr]

fixes #316

[TomWright]

The change looks good - could I ask you to add a test for this please? Just the example you gave in the original issue would be good enough.

You can add a top level test here:

dasel/internal/command/select_test.go

Line 41 in 3b466e8

func TestSelectCommand(t *testing.T) {

[TomWright]

I'll look at the failing test tomorrow

[semihbkgr]

Tests started failing after Ordered maps #289 merge.

[semihbkgr]

I slightly debugged to find out which changes cause to fail. Seems like It is the same reason as #296.

[TomWright]

OK thanks - I'll take a look to see what I broke with that PR and merge this when resolved 👍

[TomWright]

Hey @semihbkgr, sorry for the delay.

I've fixed the issue - the root cause was a new data structure being used to allow for ordered maps. I just had to replicate the same logic in another place.

Thanks for the contribution!