Describe the bug
oasdiff diff --format yaml and oasdiff diff --format json return different
object.

To Reproduce
old.yml

openapi: 3.0.3
info:
    version: 0.0.0

new.yml

openapi: 3.0.3
info:
    version: 0.0.1

1. oasdiff diff old.yml new.yml --format yaml

info:
    version:
        from: 0.0.0
        to: 0.0.1

2. oasdiff diff old.yml new.yml --format json

{"info":{"version":{"from":"0.0.0","to":"0.0.1"}},"components":{}}

3. Notice that JSON response contains additional key with an empty object.

Expected behaviour
YAML and JSON responses should be equivalent and parse to the same object.

Desktop (please complete the following information):

• OS: Linux, oasdiff v1.11.4