Empty output if the content is only a single emoji

If you use only a single emoji like 😊 for example in a block, you get an empty output. Works if you put 2 emojis, emoji with any text etc.

Example:
`[{"id": "9JhBKY4A83", "data": {"text": ""}, "type": "paragraph"}]`

Steps to reproduce:
1. Paste and save any single emoji input into a block.
2. Save and output the blocks from EditorJS
3. Look at results

Expected behavior:
Output the emoji in the block data.

Editor.js version:
2.29.1

Plugins you use with their versions:
- Paragraph
- Header
- Image
- The core ones from the editorJS team