Chore: Align the version of loash with WordPress core (#17528)

lib/client-assets.php

@@ -409,6 +409,8 @@ function gutenberg_register_vendor_scripts() {
 	// Vendor Scripts.
 	$react_suffix = ( SCRIPT_DEBUG ? '.development' : '.production' ) . $suffix;
 
+	// TODO: Overrides for react, react-dom and lodash are necessary
+	// until WordPress 5.3 is released.
 	gutenberg_register_vendor_script(
 		'react',
 		'https://unpkg.com/react@16.9.0/umd/react' . $react_suffix . '.js',
@@ -419,12 +421,9 @@ function gutenberg_register_vendor_scripts() {
 		'https://unpkg.com/react-dom@16.9.0/umd/react-dom' . $react_suffix . '.js',
 		array( 'react' )
 	);
-
-	// TODO: This is necessarily only so long as core ships with v4.17.11, and
-	// can be removed at such time a newer version is available.
 	gutenberg_register_vendor_script(
 		'lodash',
-		'https://unpkg.com/lodash@4.17.14/lodash' . $suffix . '.js'
+		'https://unpkg.com/lodash@4.17.15/lodash' . $suffix . '.js'
 	);
 }