Add support for cases syntax

[raptazure]

Thanks for the extension. Installed it on VSCode 1.51 (One Dark Pro Theme), I think it will be better to make the color more distinguishable. Now it looks like this:

[BenFradet]

I haven't been following the syntax changes too closely lately.

Is it that match / with got replaced with cases?

[raptazure]

I haven't been following the syntax changes too closely lately.

Is it that match / with got replaced with cases?

According to the reference, cases is the syntactic sugar of match / with.

[BenFradet]

Ok, then we'll need to add support for that 👍

[raptazure]

Thank you 👍