amplitude: updating sdk
Release 1.1.38
amplitude: updating to use separate fields + sessionId
Merge pull request #154 from segmentio/amplitude/separate-fields

amplitude: updating to use separate fields + sessionId
Release 1.1.39
intercom: updating endpoint

After emailing with Intercom, they're booting up a separate
cluster for us to hit.

> There won't be any change from using the new endpoint.
> It's actually just CNAMEd to our main API cluster right now.
> Once we've got you switched over we'll bring up a new cluster
> and move the traffic over to it.
Release 1.1.40