Support variable args

[rossmacarthur]

The following is valid Justfile

example +ARGS='':
    echo {{ARGS}}

But this extension doesn't highlight it correctly.

[skellock]

Heya Ross. Thanks for filing an issue!

I still use & love Just to death, I just haven't had much time to keep this maintained as you can see:

Ugh, this pains my soul ^

😆

Good news is I'll be unemployed by this time next week! Time to dust this repo off.