Update jQuery UI library for 6.1

[peterwilsoncc]

An update is available for the jQuery UI library. Core currently bundles 1.13.1.

If additional updates become available prior to 6.1, this ticket can be used to apply them.

Changelog: ​https://jqueryui.com/changelog/1.13.2/

Previously: [52648] for #54902 (5.9.1).

This PR applies minor updates of jQuery UI to WordPress. They are mainly related to checkboxradio, datepicker and selectmenu.

See what is changed between 1.13.1 and 1.13.2 at ​https://github.com/jquery/jquery-ui/compare/1.13.1...1.13.2 or at the jQuery UI official changelog(​https://jqueryui.com/changelog/1.13.2/).

Trac ticket: https://core.trac.wordpress.org/ticket/56239

Updates jQuery UI to the latest version, currently 1.13.2.

This replaces #3081.

Trac ticket: https://core.trac.wordpress.org/ticket/56239.

[desrosj]

@monolithon It looks like the "allow maintainers to update your branch" option was not checked on your PR. I noticed a few things that I've gone and corrected in a new one.

• The anonymous modules that are registered are a bit different in Core's version of the library in an effort to maintain backwards compatibility. Many of the smaller modules are included in the core.js file instead of separate ones.
• It looks like the PR had @VERSION tokens being used instead of 1.13.2. I think this is likely because a development copy of the library was used and not the actual 1.13.2 build distributed. I've updated the PR to correct that.
• There were also changes to how the jQuery foundation is referred to in the file docblocks for each file. I've also included that.

[Clorith]

PR 3278 looks good!

[desrosj]

In 54209:

External Libraries: Update the jQuery UI library to version 1.13.2.

This is a bug fix release. For more information on the changes included, see ​https://jqueryui.com/changelog/1.13.2/.

Props Clorith, monolithon, desrosj.
Fixes #56239.

Merged in https://core.trac.wordpress.org/changeset/54209.