Block Editor: Update WordPress Packages WordPress 5.4 RC 5 Take 2.

The following package versions were changed:
@wordpress/edit-post: 3.13.8 -> 3.13.9
Includes PR WordPress/gutenberg#21220

Props aduth, mapk, ItsJonQ.
Fixes: #49717.

git-svn-id: https://develop.svn.wordpress.org/trunk@47517 602fd350-edb4-49c9-b593-d223f7449a82

package.json

@@ -95,7 +95,7 @@
 		"@wordpress/deprecated": "2.7.0",
 		"@wordpress/dom": "2.8.0",
 		"@wordpress/dom-ready": "2.7.0",
-		"@wordpress/edit-post": "3.13.8",
+		"@wordpress/edit-post": "3.13.9",
 		"@wordpress/editor": "9.12.7",
 		"@wordpress/element": "2.11.0",
 		"@wordpress/escape-html": "1.7.0",