Missing "fields" in version 1.30.2

[DucPhan2997]

Describe the bug
Missing fields when using JSET to update

To Reproduce

1. SET sup-gojek test POINT 106.66329051644803 10.769453594179312
2. JSET sup-gojek test info dpv
3. FSET sup-gojek test info-field 1
4. GET sup-gojek test withfields -> {"ok":true,"object":{"type":"Point","coordinates":[10.769453594179312,106.66329051644803],"info":"dpv"},"fields":{"info-field":1},"elapsed":"15.554µs"}
5. JSET sup-gojek test info dpvUpdated
6. GET sup-gojek test withfields -> {"ok":true,"object":{"type":"Point","coordinates":[10.769453594179312,106.66329051644803],"info":"dpvUpdated"},"elapsed":"15.554µs"} Missing fields

Expected behavior
Same the old version (1.29.2), the fields should be returned

Logs
Version 1.30.2

Version 1.29.2

Operating System (please complete the following information):

• OS: Linux
• CPU: amd64
• Version: 1.30.2
• Container: Docker

Additional context
Add any other context about the problem here.

[tidwall]

Thanks a ton for reporting!
I pushed a new release that fixes this issue :)