Property assigment not working in some cases

[dayyeung]

Describe the bug

Version of yq: 4.33.2
Operating system: mac
Installed via: homebrew

case 1

$ yq -n '{"a": 1} + {} | .b = 2'
a: 1

jq equivalent:

$ jq -n '{"a": 1} + {} | .b = 2'
{
  "a": 1,
  "b": 2
}

case 2

$ yq -n '{"a": 1} + ({} | .b = 2)'
a: 1

jq equivalent:

$ jq -n '{"a": 1} + ({} | .b = 2)'
{
  "a": 1,
  "b": 2
}

case 3

$ yq -n '.a = ({} | .b = 2)'
a: {}

jq equivalent:

$ jq -n '.a = ({} | .b = 2)'
{
  "a": {
    "b": 2
  }
}

[mikefarah]

Yeah that's def not right - will look into it.

[mikefarah]

Fixed the first case in 4.33.3.