Explicitly allow unknown fields

[aumetra]

Closes #2019

[webmaster128]

Looks good as the major step.

Now do you think you can turn off additional_properties (somewhere in the schemars types) at a later stage, maybe here?

impl Api {
    pub fn render(self) -> JsonApi {

[aumetra]

Let's see if this does the trick

[aumetra]

@webmaster128 this solution now generates more additionalProperties than before. Bad, good, neutral?

[webmaster128]

Pretty good I think. The changes I see after generating this branch locally: "additionalProperties": false added for Empty, DenomUnit, DenomMetadata, BlockInfo, ContractInfo, TransactionInfo, Coin, ... This is pretty much all the types from cosmwasm-std which do not have #[cw_serde] available. So this is good.

[aumetra]

Great! Then I'll look into updating the schemas later

[webmaster128]

Nice. Could you add a CHANGELOG entry for this?

[aumetra]

Looked over my PRs again and discovered some missing changelog entries.
Added them.

[chipshort]

Looks good to me