Changes in version 0.30                         

    o   removed bug in cmr. 

    o   refactored the conversion of sexp to SEXP

                 Changes in version 0.2.1 (2022-10-19)                  

    o   all functions in C++ are now inlined

                  Changes in version 0.2 (2022-09-15)                   

    o   code can now be translated to R function and external pointer