ran npm update

Author: tabacitu

package-lock.json

@@ -12,10 +12,10 @@
 	],
 	"homepage": "http://www.tinymce.com",
 	"ignore": [
-		"readme.md",
+		"README.md",
 		"composer.json",
 		"package.json",
 		".npmignore",
-		"changelog.txt"
+		"CHANGELOG.md"
 	]
 }

src/public/packages/@digitallyhappy/backstrap/css/overlay.css

@@ -4,7 +4,7 @@
  * For LGPL see License.txt in the project root for license information.
  * For commercial licenses see https://www.tiny.cloud/
  *
- * Version: 5.7.1 (2021-03-17)
+ * Version: 5.8.1 (2021-05-20)
  */
 (function () {
     'use strict';