External Libraries: Update Moment.js to 2.26.0.

Changelog: https://github.com/moment/moment/compare/2.22.2...2.26.0

This commit also fixes a deprecation warning regarding the usage of `moment.locale()` to set locale properties.

As of Moment.js 2.12.0, `moment.locale()` is deprecated and `moment.updateLocale()` should be used instead.

Additionally, minimize `moment.js` as part of build process to remove the source map reference.

This avoids a `sourceMappingURL` being in the minified file, as we don't ship source maps.

Props yoancutillas, SergeyBiryukov.
Fixes #50408.

git-svn-id: https://develop.svn.wordpress.org/trunk@48075 602fd350-edb4-49c9-b593-d223f7449a82

Gruntfile.js

@@ -748,6 +748,10 @@ module.exports = function(grunt) {
 				src: WORKING_DIR + 'wp-includes/js/jquery/jquery.form.js',
 				dest: WORKING_DIR + 'wp-includes/js/jquery/jquery.form.min.js'
 			},
+			moment: {
+				src: WORKING_DIR + 'wp-includes/js/dist/vendor/moment.js',
+				dest: WORKING_DIR + 'wp-includes/js/dist/vendor/moment.min.js'
+			},
 			dynamic: {
 				expand: true,
 				cwd: WORKING_DIR,
@@ -1222,6 +1226,7 @@ module.exports = function(grunt) {
 		'jshint:corejs',
 		'uglify:imgareaselect',
 		'uglify:jqueryform',
+		'uglify:moment',
 		'qunit:compiled'
 	] );
 
@@ -1362,7 +1367,8 @@ module.exports = function(grunt) {
 		'uglify:embed',
 		'uglify:jqueryui',
 		'uglify:imgareaselect',
-		'uglify:jqueryform'
+		'uglify:jqueryform',
+		'uglify:moment'
 	] );
 
 	grunt.registerTask( 'build:webpack', [

package-lock.json

@@ -17213,9 +17213,9 @@
 			}
 		},
 		"moment": {
-			"version": "2.22.2",
-			"resolved": "https://registry.npmjs.org/moment/-/moment-2.22.2.tgz",
-			"integrity": "sha1-PCV/mDn8DpP/UxSWMiOeuQeD/2Y="
+			"version": "2.26.0",
+			"resolved": "https://registry.npmjs.org/moment/-/moment-2.26.0.tgz",
+			"integrity": "sha512-oIixUO+OamkUkwjhAVE18rAMfRJNsNe/Stid/gwHSOfHrOtw9EhAY2AHvdKZ/k/MggcYELFCJz/Sn2pL8b8JMw=="
 		},
 		"moment-timezone": {
 			"version": "0.5.28",

package.json

@@ -136,7 +136,7 @@
 		"jquery-ui": "https://github.com/jquery/jquery-ui/archive/1.11.4.tar.gz",
 		"lodash": "4.17.15",
 		"masonry-layout": "4.2.2",
-		"moment": "2.22.2",
+		"moment": "2.26.0",
 		"polyfill-library": "3.42.0",
 		"react": "16.9.0",
 		"react-dom": "16.9.0",

src/wp-includes/script-loader.php

@@ -95,7 +95,7 @@ function wp_default_packages_vendor( $scripts ) {
 	$vendor_scripts_versions = array(
 		'react'                       => '16.9.0',
 		'react-dom'                   => '16.9.0',
-		'moment'                      => '2.22.2',
+		'moment'                      => '2.26.0',
 		'lodash'                      => '4.17.15',
 		'wp-polyfill-fetch'           => '3.0.0',
 		'wp-polyfill-formdata'        => '3.0.12',
@@ -139,7 +139,7 @@ function wp_default_packages_vendor( $scripts ) {
 	did_action( 'init' ) && $scripts->add_inline_script(
 		'moment',
 		sprintf(
-			"moment.locale( '%s', %s );",
+			"moment.updateLocale( '%s', %s );",
 			get_user_locale(),
 			wp_json_encode(
 				array(