and update compiler version checks in CMake |compiler|minimum|current| |--------|-------|-------| |Intel |2017 |2019 | |GCC |5 |8 | |Clang |4 |7 | |MSVC |2017 |? | Minimum CUDA version for C++14 is 9.0 So use the [appropriate CUDA versions](https://gist.github.com/ax3l/9489132) for each compiler. |CUDA|GCC|Clang|Intel| |----|---|-----|-----| |9.0 |5-6|none|17 | |9.1 |5-6|4 |17 | |9.2 |5-7|4-5 |17 | |10.0|5-7|4-6 |17-18|