- new keywords, attributes and standard macros
- hexadecimal floatting point (c++17)
- highlight UDL (standard and user)
- fix some syntax error (operator""_x, #elif 0, ...)
- highlight the content of #define to the color of c++
I changed the highlight in the #define to use the color of the code (In Define rule). Only the "normal" text is the color of the preprocessor.