Sanitize pasted block data

Author: hata6502

dist/editor.js

@@ -4,6 +4,7 @@
 
 - `Fix` - The problem with destroy() method [#1380](https://github.com/codex-team/editor.js/issues/1380).
 - `Fix` - add getter keyword to `block.mergeable` method [#1415](https://github.com/codex-team/editor.js/issues/1415).
+- `Fix` - Sanitize pasted block data [#1396](https://github.com/codex-team/editor.js/issues/1396).
 
 
 ### 2.19

docs/CHANGELOG.md

@@ -760,9 +760,10 @@ export default class Paste extends Module {
    * @returns {void}
    */
   private insertEditorJSData(blocks: Array<Pick<SavedData, 'data' | 'tool'>>): void {
-    const { BlockManager, Tools } = this.Editor;
+    const { BlockManager, Sanitizer, Tools } = this.Editor;
+    const sanitizedBlocks = Sanitizer.sanitizeBlocks(blocks);
 
-    blocks.forEach(({ tool, data }, i) => {
+    sanitizedBlocks.forEach(({ tool, data }, i) => {
       let needToReplaceCurrentBlock = false;
 
       if (i === 0) {