fix(package): update raven to version 2.0.2

[muffinresearch]

Closes #2375

[muffinresearch]

See the release details here:

https://github.com/getsentry/raven-node/releases

Note specifically:

• Node processes with raven will now exit in exactly the same situations as if raven were not present
  • Previously, there were failure scenarios where raven would erroneously cause the process to continue to run when it should have shut down
  • Be aware when upgrading: it is possible that with raven-node 2.0, your node process will shut down from exceptions where it previously did not

[tofumatt]

I ran this locally, hit pages that throw, browsed around, ran the tests, and things seemed fine with no premature exits from exceptions. I'm gonna say this is okay.

[tofumatt]

Looks like #2615 supercedes this though; tested that and it works as well so will merge that.