ATK is updated to 3.1.0 with heavy code refactoring. Old C++ standards are now dropped and it requires now a full C++17 compliant compiler.

The main difference for filter support is that explicit SIMD filters using libsimdpp have been dropped while tr2::simd becomes standard and supported by gcc, clang and Visual Studio.

Download link: ATK 3.1.0

Changelog:
3.1.0

* Move to C++17 only
* Drop support for libsimdpp (SIMD support will move in another direction)
* Fix Eigen and gsl installs
* Enhance coverage tests