Description

When pasting markdown tables with empty cells, those cells are being ignored.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://www.tablesgenerator.com/markdown_tables
2. Generate a table or use the following example:

|   |      | Text  |       |      |
|---|------|-------|-------|------|
|   |      |       |       | Text |
|   | Text |       |       |      |
|   |      | Text1 | Text2 |      |

This should render to:

3. Copy and paste to an empty Gutenberg page or post
4. See error:
   

Expected behavior

Tables should be parsed from markdown correctly, as they do for example in github or gitlab environments.

Desktop

• Browser: Tested in latest Chrome and Firefox

Additional context

• Gutenberg Version: 4.1.1