fix(cli): add support for GIT_PARAMS on windows. Closes #103

[kumarharsh]

Description

The commit adds a new special parser for the edit flag for Windows,
so that $GIT_PARAMS can be read from the command-line

Motivation and Context

commitlint on Windows doesn't work when $GIT_PARAMS are
specified in the package.json file.

#103

Usage examples

// commitlint.config.js
module.exports = {
  extends: ["@commitlint/config-conventional"]
};

// package.json
{
  ...
  "scripts": {
    "commitmsg": "commitlint -e $GIT_PARAMS"
  }
}

How Has This Been Tested?

Edit:

• new integration tests added

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[marionebl]

I took the liberty to add two new test cases (that were missing in the first place) and added a comment to the implementation explaining why this is needed.

Thanks for your work!