Serialize default, but ignore null value.

[elkasvirElka]

I have
@serializable
data class A (var taskStatus: String? = null,
var locale: String = "en-US")

I want to deserialize all defaults except null value:
{"locale": "en-US"}

[sandwwraith]

See also #195

[ArcticLampyrid]

Providing EncodeDefault annotation per field can be helpful to this situation.
#1091

[ArcticLampyrid]

I want to deserialize all defaults except null value

Same feature is required in Protobuf to help handle null values by omitting

[qwwdfsad]

Fixed along with #195