Update raven to the latest version 🚀

[greenkeeper]

Version 2.2.0 of raven just got published.

Dependency	raven
Current Version	2.1.2
Type	dependency

The version 2.2.0 is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of raven.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

---

Release Notes

2.2.0

• Fixed all Node v8 tests to ensure everything is working correctly [See #366]
• Raven now uses Prettier to format it's code [See #364]
• Prevent Raven from queueing too many requests in case server is down [See #132]
• Enable keep-alive on socket connection and limit number of sockets [See #284]
• Pull Error's name from constructor, not Error itself to always get correct error type [See #372]
• Updated Errors serialization to store all additional properties and allow for attaching other object instances directly to it [See #376]
• Preserve some non-enumerable properties from request [See #379]
• Fall back to NODE_ENV for Sentry Environment [See #384]

Commits

The new version differs by 25 commits.

• 8ddc507 2.2.0
• 540b5f0 docs: Include information about fatalError install callback
• 343da4a Rewrote tests and simplified implementation
• c5eec04 feat: Preserve some non-enumerable properties from request
• 9219b55 feat: Fall back to NODE_ENV for Sentry Environment
• a692001 feat(transport): retrieve socket name from http/s agents and add tests
• 9dbfdd5 feat(transport): enable keep-alives and limit number of sockets
• 868e8e0 docs: Add name config description and optional ENV vars
• 6399a49 ci: Trigger build only once and cache deps
• 33d8b17 docs: Add Sails.js integration docs
• fe6796f docs: Mention git-rev usage in release config attribute
• 519c3f0 feat: Add Errors serialization to json-stringify-safe
• 00b0c83 ref: Use local json-stringify-save package
• 4981c06 docs: Fix syntax error for Loopback integration
• 354054b Add test for maxReqQueueCount

There are 25 commits in total.

See the full diff

Not sure how things should work exactly?

There is a collection of frequently asked questions and of course you may always ask my humans.

---

Your Greenkeeper Bot 🌴