not possible to pass data as buffer

[benkroeger]

it seems that when passing a Buffer in const options = { data: Buffer.from('foo') }, centra would handle it as json since typeof Buffer resolves to object.
I see two solutions here:

1. default sendAs to 'raw', which would become a breaking change (since currently 'json' is assumed
2. add options.buffer and leave options.data as is. When options.buffer is used, call req.body(options.buffer, 'raw')

Thoughts? Happy to provide PR after discussion about suggested options

[ethan7g]

Thanks for submitting the issue, @benkroeger!

Patch 3.2.1 has resolved the issue as now buffers are sent in their intended form: as binary data!
This patch is now available on NPM. :)