refactor(pt2): use C for the external scanner

[amaanq]

try ts t or ts p <file> and it should be fine now

[uyha]

I think scan needs to be static also and I don't think inline is needed

[uyha]

also is_bracket_argument

[uyha]

basically any functions that were in the anonymous namespace will have to be static

[amaanq]

The reason advance needs to be static is because (I believe) it conflicts with the lexer->advance function, so it is attempting to call itself, resulting in the segfault. I could be completely wrong of course. But the others dont need to be...but I can make them static anyways

[uyha]

Just to make them have the same semantic with the C++ file, in the C++ version, having them in the anonymous namespace make them have internal linkage, which makes sure they are not conflict with any other same name functions. Hence when switching to C, making them all static to have the same linkage. Also inline doesn't do anything here so plesae remove them.

[amaanq]

ok, done

[uyha]

you need to update the binding.gyp and build.rs

[amaanq]

done