OpenRefine: Plurals don't work for i18n package

Describe the bug

The i18n package is missing the CLD rule parser, so plurals don’t work for many languages.

To Reproduce Per https://github.com/OpenRefine/OpenRefine/issues/1858#issuecomment-637274292

$.i18n().locale = 'en';
$.i18n("$1 de $2 {{plural:$2|page|pages}}", 5, 10);
$.i18n().locale = 'fr';
$.i18n("$1 de $2 {{plural:$2|page|pages}}", 5, 10);

The last line gives this:

project-bundle.js:28751 Uncaught ReferenceError: pluralRuleParser is not defined
    at Object.getPluralForm (project-bundle.js:28751)
    at Object.convertPlural (project-bundle.js:28751)
    at Object.plural (project-bundle.js:28744)
    at Object.emit (project-bundle.js:28744)
    at project-bundle.js:28744
    at Function.map (project-bundle.js:504)
    at Object.emit (project-bundle.js:28744)
    at Object.parse (project-bundle.js:28739)
    at a.parse (project-bundle.js:28723)
    at Function.e.i18n (project-bundle.js:28723)

Proposed solution Include https://github.com/santhoshtr/CLDRPluralRuleParser/blob/8baf9aedc428924fe6ee508b3d952cb5564efb3a/src/CLDRPluralRuleParser.js (and perhaps https://github.com/santhoshtr/CLDRPluralRuleParser/blob/8baf9aedc428924fe6ee508b3d952cb5564efb3a/data/plurals.json)

(check for the appropriate version to match the version of Wikimedia i18n that we’re using)

OpenRefine:

• Version 3.4 beta - current master