2017-09-05, Version 6.11.3 'Boron' (LTS)

This LTS release comes with 152 commits. This includes 75 which are
test related, 25 which are doc related, 21 which are build / tool
related and 3 commits which are updates to dependencies.

Notable Changes:

* build:
 - Codesigning is fixed on macOS (Evan Lucas)
   https://github.com/nodejs/node/pull/14179
* deps:
 - Snapshots are turned back on!!! (Yang Guo)
   https://github.com/nodejs/node/pull/14385
* path:
 - win32 volume-relative paths are working again! (Timothy Gu)
   https://github.com/nodejs/node/pull/14440
* tools:
 - v6.x can now build with ICU 59 (Steven R. Loomis)
   https://github.com/nodejs/node/pull/12078

PR-URL: https://github.com/nodejs/node/pull/14852