Pin numpy==1.24, last version compatible with py38

Author: softwareengineerprogrammer

setup.py

@@ -61,7 +61,7 @@ def read(*names, **kwargs):
     keywords=['geothermal'],
     python_requires='>=3.7',
     install_requires=[
-        'numpy==1.26',
+        'numpy==1.24',  # Last version compatible with Python 3.8
         'numpy-financial',
         'pint',
         'forex_python',