Block Editor: Update WordPress Packages WordPress 5.4 Beta 3.

The following package versions were changed:
@wordpress/block-directory: 1.5.1 -> 1.5.2
@wordpress/block-editor: 3.7.1 -> 3.7.2
@wordpress/block-library: 2.14.1 -> 2.14.2
@wordpress/components: 9.2.1 -> 9.2.2
@wordpress/edit-post: 3.13.1 -> 3.13.2
@wordpress/editor: 9.12.1 -> 9.12.2
@wordpress/format-library: 1.14.1 -> 1.14.2
@wordpress/list-reusable-blocks: 1.13.1 -> 1.13.2
@wordpress/media-utils: 1.7.1 -> 1.7.2
@wordpress/nux: 3.12.1 -> 3.12.2
@wordpress/server-side-render: 1.8.1 -> 1.8.2

Fixes #49506.

git-svn-id: https://develop.svn.wordpress.org/trunk@47354 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/blocks/social-link/block.json

@@ -1,6 +1,7 @@
 {
 	"name": "core/social-link",
 	"category": "widgets",
+	"icon": "share",
 	"attributes": {
 		"url": {
 			"type": "string"