4.49.0
(feat): Add body-sort option to webhook signature payload format. When set to
alphabetical, POST body parameters are sorted by key before being
concatenated into the signing payload. This is required by providers like
Twilio. Supported in both Fern Definition (body-sort: alphabetical inside
payload-format) and OpenAPI specs (body-sort: alphabetical inside the
payload-format block of x-fern-webhook-signature).