Unused parameter warnings

[tmayoff]

We're using this in our codebase and would like to be able to compile with -Werror and -Wunused-parameter. But are being prevented by this library.

../subprojects/etl-20.38.10/include/etl/vector.h:270:25: warning: unused parameter 'n' [-Wunused-parameter]
    void reserve(size_t n)

Is there a combination of macros that can silence this warning. Or can this be fixed in this repo?

[jwellbelove]

I will be pushing a new release very soon. I'll add the change to it.

[jwellbelove]

Fixed 20.39.3