Node v12 failing unit test with node flag "--preserve-symlinks"

[juergba]

Description

Our unit tests fail with:

1) node-flags
       isNodeFlag()
         special cases
           should return true for flags starting with "preserve-symlinks":
     UnexpectedError: 
expected true to be false

It's the only failing test while running npm test on Windows.

According to Node's docu this flag should still exist. It is also included within process.allowedNodeEnvirnmentFlags.

Versions

• The output of mocha --version and node node_modules/.bin/mocha --version: current master
• The output of node --version: v12.1.0
• Your operating system
  • name and version: Windows 10
  • architecture (32 or 64-bit): 64
• Your shell (e.g., bash, zsh, PowerShell, cmd): VSCode command
• Your browser and version (if running browser tests):
• Any third-party Mocha-related modules (and their versions):
• Any code transpiler (e.g., TypeScript, CoffeeScript, Babel) being used (and its version):