encoding/json: add omitzero option
Fixes #45669
Change-Id: Ic13523c0b3acdfc5b3e29a717bc62fde302ed8fd
GitHub-Last-Rev:
57030f26b0062fa8eda21b3a73b7665deab88c76
GitHub-Pull-Request: golang/go#69622
Reviewed-on: https://go-review.googlesource.com/c/go/+/615676
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Michael Knyszek <mknyszek@google.com>