Empty output if the content is only a single emoji

[jingjunm]

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