* Changed &arr[0] to std::array<T, N>::data and std::address_of to protect against overloaded operator&.
* Removed the usage of `std::addressof` because it is a C++ 17 feature. Using decay for C arrays instead.
* Add unit tests for #662.
* Added c++17 test configurations for clang5.0 and clang6.0
* fixed CppCoreCheck pointer decay warning