Add support for ClientCertificateId

[Craig Burdulis]

It would be nice to be able to specify a ClientCertificateId value since this is a stage setting. It seems like it would just require an additional line to be added here:

serverless-api-stage/src/index.js

Line 114 in bce93e6

 Variables: stageSettings.Variables || {}, 

along the lines of:
ClientCertificateId: stageSettings.ClientCertificateId || {},

Thoughts? Is this possible?

[Ben New]

@icj217 Sorry for delay getting back on this, I think that should be possible, I'll take a look

[Ben New]

@icj217 Are you able to test using #7? I haven't got anything set up to use client certs to test with.