Color syntax missing on multi generic method

Please check this piece of code.
It seen the method is not well colored.

```v
module main

struct Db {}
struct User {}
struct Post {}

fn main() {
	r := Db{}
	u := User{}
	p := Post{}

	r.do(u, p)
}

fn (r Db) do<X,Y>(x X, y Y) {
	println(x)
	println(y)
}
```

By the way, thank you for this great extension.