Invalid regular expression in Safari < 16.4

[gbasto]

Describe the bug
Lookbehind regular expressions are being used to bold and code markdown text (detectMarkdown.ts).
Lookbehind is only supported from 16.4 above (caniuse), making any page that uses BlockNote unable to be used by Safari browsers bellow 16.4.

To Reproduce
Open any page (example) with BlockNote v0.33.0 in a Safari prior 16.4 and you get a blank page with a console error:
Invalid regular expression: invalid group specifier name

Misc
This was also an issue in Tiptap before, fixed in the meantime.
The issue #1760 is related with this, but it was misunderstood that the problem was related with named capture groups. The error is related with lookbehinds but Safari < 16.4 misinterprets them with a named capture groups hence the error message.

• Node version:
• Package manager:
• Browser: Safari < 16.4
• I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[nperez0111]

Would be happy to accept a PR that resolves this.

[gbasto]

Would be happy to accept a PR that resolves this.

Sure! Adding first unit test in #1826. I'll follow-up with a PR to update the regular expressions.

[gbasto]

Fixed in #1827.