* Support new http[s] get/request function signature in Node v10+

Added the following Span Event attributes:
- http.statusCode
- http.statusText

The above attributes will be replacing the following *deprecated* attributes:
- httpResponseCode
- response.status
- response.statusMessage

The deprecated attributes will be removed with the next major release of the Agent.

- Updates version check to be in alignment with [our stated support
  policy](https://docs.newrelic.com/docs/agents/nodejs-agent/getting-started/compatibility-requirements-nodejs-agent)
  and the version constraints in package.json

* Redacts individual certificates configuration values before sending to server
  settings.

 When configured, these values will now appear like: .