Add object literal sort option to account for special characters

[pe8ter]

PR checklist

• Addresses an existing issue: object-literal-sort-keys and accented words #4167
• Enhancement
  • Includes tests
• Documentation update

Overview of change:

The current behavior of the object-literal-sort-keys rule is to sort any accented characters after the non-accented "z" character, which is undesirable in accent-heavy languages like Spanish, French, and German. This change gives users of this rule the option to sort accented characters next to their non-accented counterpart.

Is there anything you'd like reviewers to focus on?

• This PR makes no attempt to allow the user to configure which language they want to target. The default behavior of the localeCompare() function is to make a "best fit" guess at which locale to use.
• The bulk of this PR is auto-formatting changes so I noted the logic change explicitly with a comment.
• I wasn't sure how to format the CHANGELOG.md message.

Reference links:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/localeCompare
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_negotiation

CHANGELOG.md entry:

[new-rule-option] object-literal-sort-keys: locale-compare

[pe8ter]

Here is where the logic change starts for this PR. The preview doesn't really frame the changes well. The actual change I want to highlight is below this comment.

[pe8ter]

I'm not sure what's happening. I resolved the conflicts using GitHub's built-in tool and committed my changes, but this page still shows that there's a merge conflict and the commit doesn't appear in this PR's history. If I try to resolve the conflicts again, the tool refuses to save my changes due to an unspecified error. GitHub officially reported a service disruption.

[pe8ter]

I'm not sure what's happening. GitHub seems to be having issues right now. I fixed my conflicts, but they're not appearing in this PR. I already tried adding a comment stating this, but the comment disappeared mysteriously. GitHub officially reported a service disruption.

[ericanderson]

Please update the tests to have something that would fail against master but work in your branch.

Also please rename your directory under test from local-compare to locale-compare

[ericanderson]

Apologies for the delay in getting to this PR.

[pe8ter]

Thank you for your feedback. I made all requested changes:

• Use data set where tests fail in master, but pass in feature branch.
• Rename local-compare → locale-compare.