Why?

In #1758, we addressed an issue where nil parameters were not being serialized in V2 endpoints. Unlike in V1 (where you use an empty string "" for emptying), in V2 to empty a hash, you need to set it to null.

The above PR actually broke (some) V2 GET requests because it attempts to serialize nil on GET's instead of just POST's. For query parameters, say for a List method, that will become ?limit=, which will be interpreted by the server as an empty string "", which is not a valid integer for limit.

So, this PR puts in the proper fix on master. We will amend beta and private-preview branches with this new logic in other PRs.

What?

• Serializes nil values in V2 POST requests

Changelog

• Fixes a bug where V2 POST requests were not serializing null values.