Improve build support for newer Python versions

[elfring]

trafficstars

I would like to point the following information out once more.

[Markus_Elfring@fedora guider]$ LANG=C make
  CC       guiderLib.o
…
guiderLib.c: In function 'initguider':
guiderLib.c:344:12: warning: implicit declaration of function 'Py_InitModule'; did you mean 'SYS_init_module'? [-Wimplicit-function-declaration]
  344 |     (void) Py_InitModule("guider", guiderMethods);
      |            ^~~~~~~~~~~~~
      |            SYS_init_module
 …

I suggest to take corresponding advices for such an implementation detail better into account from other known information sources.

[iipeace]

thank you for report! :)