Upgrade Partykit and Require a Body for POSTs

[luke-rucker]

Upgraded Partykit deps to their latest versions and made a body required for POST endpoints.

[luke-rucker]

Quite a few versions ago it seems Partykit now only supports returning Fetch API Responses from onFetch, removing the need for UserDefinedResponse .

[ayoubqrt]

Hi @luke-rucker ,
EDIT: I didn't saw that you branch is based on a draft PR of alex, so the message is destinated for him.
@astahmer I tried to debug but I think I don't have the appropriate setup to debug this. I build the library to use it in the examples/basic app but voilà I can't debug the library.

Thank you for your work, I tried the example with your version of the library. It's seems that the post request made (Add to counter) don't work. Here's the reason:

I didn't investigate more but in the createAssert method i have this values on the objects when I received the post request. The body is still a ReadableStream, it surely have to be parsed before, no ? And the server return status 200 while there is an error.

On the create-party-rpc.ts, we can see that alex decode the body before making the safeParse with valibot