bug#61205: 'function' in 3rd element of treesit-font-lock-feature-list

[Yuan Fu]

> On Jan 31, 2023, at 6:08 PM, Dmitry Gutov <dgutov@yandex.ru> wrote:
> 
> X-Debbugs-Cc: Yuan Fu <casouri@gmail.com>, Randy Taylor <dev@rjt.dev>
> 
> Some new built-in modes has 'function' feature highlighting thus enabled by 
> default.
> 
> rust-ts-mode, go-ts-mode, cmake-mode
> 
> Should we move it to 4 for consistency with the rest?
> 
> Previously, we talked about that and concluded that function calls are 
> usually everywhere and are easy to notice without additional highlighting.

Right, I think they should be level 4.

Yuan