jsonrpc: Skip serializing params if params are None (#5471)

The JSONRPC spec says:

> If present, parameters for the rpc call MUST be provided as a
> Structured value

https://www.jsonrpc.org/specification#parameter_structures

(Where a "Structured value" is elsewhere defined as either a map or
array.)

This change skips the serialization of the `params` field for JSONRPC
method calls and notifications if the `params` field is the `None`
variant. This fixes compatibility with LSP servers which adhere closely
to that part of the spec: `ocamllsp` in the wild.

0 files changed, 0 insertions, 0 deletions