CloudEvents Support

What's Changed

Fixes

• Ignore telemetry service errors by @blinktag in #354

Improvements

• Support for cloud events by @blinktag in #347
  See https://github.com/batchcorp/plumber/blob/master/docs/examples.md#publish-cloudevents for example usage

Full Changelog: v2.2.1...v2.3.0