Log Message:
Update lang/nodejs to 8.1.1.

8.1.1

Child processes
- stdout and stderr are now available on the error output of a failed
  call to the util.promisify()ed version of child_process.exec.

HTTP
- A regression that broke certain scenarios in which HTTP is used
  together with the cluster module has been fixed.

HTTPS
- The rejectUnauthorized option now works properly for unix sockets.

Readline
- A change that broke npm init and other code which uses readline
  multiple times on the same input stream is reverted.

8.1.0

Async Hooks
- When one Promise leads to the creation of a new Promise, the parent
  Promise will be identified as the trigger

Dependencies
- libuv has been updated to 1.12.0
- npm has been updated to 5.0.3

File system
- The fs.exists() function now works correctly with util.promisify()
- fs.Stats times are now also available as numbers

Inspector
- It is now possible to bind to a random port using --inspect=0

Zlib
- A regression in the Zlib module that made it impossible to properly
  subclasses zlib.Deflate and other Zlib classes has been fixed.