Tui.editor: Add ability to customize allowed attributes

[wintercounter]

Current Behavior

There is a fixed list of allowed attributes in htmlSanitezer. I need this because I need to convert all tags to custom web component based tags with attributes. Changing tags is not a problem, but I cannot add my attributes as it's being stripped.

Expected Behavior

Allow set/add allowed attributes.

This issue I think is kinda related, an adjustable list would solve this problem too imo:
https://github.com/nhn/tui.editor/issues/417

UPDATE:
I've checked out and added my own attributes to the regex, seems like everything's fine.

[stale[bot]]

This issue has been automatically marked as inactive because there hasn’t been much going on it lately. It is going to be closed after 7 days. Thanks!

[stale[bot]]

This issue will be closed due to inactivity. Thanks for your contribution!