message: bump C++ version to 17
diff: @@ -21,7 +21,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
  set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
  set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
  -set (CMAKE_CXX_STANDARD 11)
  +set (CMAKE_CXX_STANDARD 17)
  ## Find dependencies ##
  