2018-03-21, Version 9.9.0 (Current)

Notable changes:

* assert:
  - From now on all error messages produced by `assert` in strict mode
    will produce a error diff. (Ruben Bridgewater)
    https://github.com/nodejs/node/pull/17615
  - From now on it is possible to use a validation object in throws
    instead of the other possibilities. (Ruben Bridgewater)
    https://github.com/nodejs/node/pull/17584
* crypto:
  - allow passing null as IV unless required (Tobias Nießen)
    https://github.com/nodejs/node/pull/18644
* fs:
  - support as and as+ flags in stringToFlags() (Sarat Addepalli)
    https://github.com/nodejs/node/pull/18801
* tls:
  - expose Finished messages in TLSSocket (Anton Salikhmetov)
    https://github.com/nodejs/node/pull/19102
* tty:
  - Add getColorDepth function to determine if terminal supports colors
    (Ruben Bridgewater) https://github.com/nodejs/node/pull/17615
* util:
  - add util.inspect compact option (Ruben Bridgewater)
    https://github.com/nodejs/node/pull/17576
* **Added new collaborators**
  - [watson](https://github.com/watson) Thomas Watson

PR-URL: https://github.com/nodejs/node/pull/19428