update pypi python requirement

Author: yoelcortes

setup.py

@@ -82,9 +82,8 @@
                  'Operating System :: POSIX :: BSD',
                  'Operating System :: POSIX :: Linux',
                  'Operating System :: Unix',
-                 'Programming Language :: Python :: 3.8',
-                 'Programming Language :: Python :: 3.9',
-                 'Programming Language :: Python :: 3.10',
+                 'Programming Language :: Python :: 3.12',
+                 'Programming Language :: Python :: 3.13',
                  'Programming Language :: Python :: Implementation :: CPython',
                  'Topic :: Education'],
     keywords=['thermodynamics', 'chemical engineering', 'mass and energy balance', 'material properties', 'phase equilibrium'],