yes, a future TODO

the python version, from which this is based, has built in proxy support

but at the time of original writing faraday 0.8.9 did not support proxy, 0.9.0 appears to have it - but it's not well documented - i.e. it's not demo'd in the README

also, we haven't needed the proxy feature yet, so I haven't bothered with it

I've noted this in an issue as well: https://github.com/practicefusion/telesignature/issues/1