Travis CI has made some changes to their webhook payload. These are

currently effective on travis-ci.com, and will likely be making it to

travis-ci.org soon.
The biggest of these is that the global_env key is completely gone.

There's a top-level env key, but that's in a weird hard-to-parse

format. I've changed it to pull the relevant keys out of the matrix data

instead.
Second, I was encountering a new errored state for some builds. I've

added handling for this and logging for any future states which we don't

handle.

Posted some changes that triggered Travis CI builds and saw the webhook

handler work correctly.