Add option to not serialize empty collections if configured.

[delopst]

Hi.

I have a scenario where I want to serialize default values (for example false for boolean), but I want to configure serialization so that empty collections and nulls are not serialized by default.

I can currently achieve the default values are serialized and nulls are removed with the following example:

 val json: Json = Json {
        encodeDefaults = true
        explicitNulls = false
    }

Is it possible also to add an additional property to configure that empty collections will not be serialized?

Regards, Primoz

[sandwwraith]

See #195 and #1091. Although we don't have special setting for empty collections now, only for nulls.