new Mocha(options) only honors options.globals, ignores options.global

[pascalpp]

Prerequisites

• Checked that your issue hasn't already been filed by cross-referencing issues with the faq label
• Checked next-gen ES issues and syntax problems by using the same environment and/or transpiler configuration without Mocha to ensure it isn't just a feature that actually isn't supported in the environment in question or a bug in your code.
• 'Smoke tested' the code to be tested by running it outside the real test suite to get a better sense of whether the problem is in the code under test, your usage of Mocha, or Mocha itself
• Ensured that there is no discrepancy between the locally and globally installed versions of Mocha. You can find them with: node node_modules/.bin/mocha --version(Local) and mocha --version(Global). We recommend that you not install Mocha globally.

Description

When create a Mocha instance programmatically, options.globals is honored, but options.global is ignored. This is contrary to the docs:

Updated in v6.0.0; the option is --global and --globals is now an alias.

Steps to Reproduce

Expected behavior: options.global or options.globals should be honored

Actual behavior: only options.globals is honored

Reduced test case here: https://github.com/pascalpp/mocha-globals-repro

Reproduces how often: [What percentage of the time does it reproduce?] 100%

Versions

• The output of mocha --version and node node_modules/.bin/mocha --version: 6.1.4
• The output of node --version: v10.15.1
• Your operating system
  • name and version: Mac OS X Mojave
  • architecture (32 or 64-bit): 64-bit
• Your shell (e.g., bash, zsh, PowerShell, cmd): bash
• Your browser and version (if running browser tests): n/a
• Any third-party Mocha-related modules (and their versions): none
• Any code transpiler (e.g., TypeScript, CoffeeScript, Babel) being used (and its version): none

Additional Information

See test case: https://github.com/pascalpp/mocha-globals-repro