VS Code settings unrelated to TSLint->ESLint should be ignored

[JoshuaKGoldberg]

🐛 Bug Report

• tslint-to-eslint-config version: 0.6.0
• ESLint version: N/A
• Node version: N/A

Actual Behavior

If your .vscode/settings.json includes a setting that starts with editor.:

{
    "editor.tabSize": 4,
}

You'll get a warning when running tslint-to-eslint-config that it's not known:

1 editor setting is not known by tslint-to-eslint-config to have an ESLint equivalent:
  * tslint-to-eslint-config does not know the ESLint equivalent for TSLint's "editor.tabSize".

Expected Behavior

Only editor settings relevant to TSLint->ESLints should be complained about.

Reproduction

1. Create a directory with a .vscode/settings.json equivalent to the above
2. Run tslint-to-eslint-config