2018-01-13, Version 6.13.0 'Boron' (LTS)

This LTS release comes with 112 commits, 17 of which are considered
Semver-Minor. This includes 32 which are doc related, 30 which are test
related, 8 which are build / tool related and 1 commit which updates
a dependency.

Notable Changes:

* console:
  - added console.count() and console.clear() (James M Snell)
    https://github.com/nodejs/node/pull/12678
* crypto:
  - expose ECDH class (Bryan English)
    https://github.com/nodejs/node/pull/8188
  - added cypto.randomFill() and crypto.randomFillSync() (Evan Lucas)
    https://github.com/nodejs/node/pull/10209
  - warn on invalid authentication tag length (Tobias Nießen)
    https://github.com/nodejs/node/pull/17566
* deps:
  - upgrade libuv to 1.16.1 (cjihrig)
    https://github.com/nodejs/node/pull/16835
* dgram:
  - added socket.setMulticastInterface() (Will Young)
    https://github.com/nodejs/node/pull/7855
* http:
  - add agent.keepSocketAlive and agent.reuseSocket as to allow
    overridable keep-alive b...