"not null" declaration, now more a doubt and maybe a bug

[DMenezes69]

Describe the bug
Just installed the extension, and it is amazing. But i found out that columns that you declare as "not null", it turns out in the preview with a "(!)" right in the end of column preview, i am not sure if it is a true bug or if it is like that for preview purposes. Since in the GIF image show off something different, and also difers from what you have on the official web tool of DBML.

To Reproduce
Steps to reproduce the behavior:

1. Go to your .dbml file
2. Edit any column settings with a "not null" (eg.: "name varchar(48) [not null, note: 'client name']")
3. And watch the preview for the "(!)"

Expected behavior
A preview without the "(!)" right in the end of any column with "not null" declared.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• VSCode
• Version 1.100.0