use <cmath> instead of <math.h>

[asakovets]

Hi,

I get compilation errors when using GamepadMotion.hpp on macos. Here is the trivial example:

#include "./GamepadMotion.hpp"

int main () {}

~/s/GamepadMotionHelpers (main)> clang++ test.cc -std=c++23
In file included from test.cc:1:
././GamepadMotion.hpp:1174:30: error: no member named 'abs' in namespace 'std'; did
      you mean simply 'abs'?
 1174 |         y = worldYawSign * std::min(std::abs(worldYaw) * yawRelaxFactor, sqrtf(gyroY * gyroY + gy...
      |                                     ^~~~~~~~
      |                                     abs

This also happens on Linux when using clang and libc++: https://godbolt.org/z/3Pe1bYznh

Including <cmath> instead of <math.h> fixes the issue.