Set CMakeLists.txt to version 4.0.0 for release
Set CMakeLists.txt to version 4.0.0 for release

bradparks/ChaiScript__cplusplus_scripting_language,kamilzubair/ChaiScript,bradparks/ChaiScript__cplusplus_scripting_language,kamilzubair/ChaiScript,kamilzubair/ChaiScript,bradparks/ChaiScript__cplusplus_scripting_language