External Libraries: Install jQuery via NPM.

Previously, jQuery 1.12.4 was added to the WordPress SVN repo in order to backport an upstream security patch from jQuery 3.4.0.

Now that WordPress includes an unmodified version of jQuery 3.5.1 and no longer needs to maintain a fork, it can be removed from the SVN repo and installed via NPM again as part of the build.

Follow-up to [45342], [49101].

Props peterwilsoncc, SergeyBiryukov.
Fixes #52647.

git-svn-id: https://develop.svn.wordpress.org/trunk@50445 602fd350-edb4-49c9-b593-d223f7449a82

Gruntfile.js

@@ -187,6 +187,8 @@ module.exports = function(grunt) {
 						// Renamed to avoid conflict with jQuery hoverIntent.min.js (after minifying).
 						[ WORKING_DIR + 'wp-includes/js/hoverintent-js.min.js' ]: [ './node_modules/hoverintent/dist/hoverintent.min.js' ],
 						[ WORKING_DIR + 'wp-includes/js/imagesloaded.min.js' ]: [ './node_modules/imagesloaded/imagesloaded.pkgd.min.js' ],
+						[ WORKING_DIR + 'wp-includes/js/jquery/jquery.js' ]: [ './node_modules/jquery/dist/jquery.js' ],
+						[ WORKING_DIR + 'wp-includes/js/jquery/jquery.min.js' ]: [ './node_modules/jquery/dist/jquery.min.js' ],
 						[ WORKING_DIR + 'wp-includes/js/jquery/jquery.form.js' ]: [ './node_modules/jquery-form/src/jquery.form.js' ],
 						[ WORKING_DIR + 'wp-includes/js/masonry.min.js' ]: [ './node_modules/masonry-layout/dist/masonry.pkgd.min.js' ],
 						[ WORKING_DIR + 'wp-includes/js/twemoji.js' ]: [ './node_modules/twemoji/dist/twemoji.js' ],

package.json

@@ -134,6 +134,7 @@
 		"formdata-polyfill": "3.0.13",
 		"hoverintent": "2.2.1",
 		"imagesloaded": "4.1.4",
+		"jquery": "3.5.1",
 		"jquery-color": "https://github.com/jquery/jquery-color/archive/2.1.2.tar.gz",
 		"jquery-form": "4.2.1",
 		"jquery-hoverintent": "1.8.3",