More syntax highlighting fix

[mug1wara26]

Previously, multiline strings using \ to escape newlines did not highlight properly, this has been fixed

Additionally, using multiple divisions in the same line would cause it to be matched as an illegal regex expression, this has also been fixed

This fixes two more bugs for issue #42

[mug1wara26]

oops didnt run the test files, will fix those

[mug1wara26]

For the regex literal detection, i just took it from a js textmate syntax file lol
furthermore, i'll make the LSP throw errors when it detects regexp expressions

[RichDom2185]

Was the yarn.lock update intentional?

[mug1wara26]

Ah for some reason I had a merge conflict in my yarn.lock? When I reran yarn it fixed the merge conflict for me

[RichDom2185]

I got it, seems like @heyzec switched to Yarn Berry in #18 but did not update the packageManager field in package.json resulting in a conflict with corepack. Will fix

[RichDom2185]

LGTM, thanks!