General: Ensure newline at end of file.

Follow up to [57433].

git-svn-id: https://develop.svn.wordpress.org/branches/5.9@57447 602fd350-edb4-49c9-b593-d223f7449a82

Author: desrosj

package-lock.json

@@ -176,4 +176,4 @@
 		"test:visual": "node ./tests/visual-regression/run-tests.js",
 		"wp-packages-update": "wp-scripts packages-update"
 	}
-}
+}