Decrease boost dependency to 1.72.0

[Jean1995]

Boost version 1.75.0 is only supported on Linux kernels newer than 4.11 due to some changes in the release.

However, cubic_interpolation is also running fine with boost version 1.74.0.

To support older Linux kernels, it would be nice to decrease the requirement of the boost version (at least until we absolutely need something from a newer boost package).

This would solve this issue in PROPOSAL, at least for now.

We would also have to apply this change in conan-center-index.

[MaxSac]

i think setting the dependency to the minimum required version would be more consistent. could you try if it still works correctly with boost 1.69?

[Jean1995]

i think setting the dependency to the minimum required version would be more consistent. could you try if it still works correctly with boost 1.69?

I tried installing cubic-interpolation using boost 1.71, however this did not work since cardinal_cubic_b_spline.hpp has been introduced in version 1.72.

But I can try if version 1.72 works.

[Jean1995]

With version 1.72 of boost, building cubic_interpolation and running the tests worked on all systems that I have available (arch Linux, Scientific Linux 7.9, macOS Catalina).