remove python 3.7 from supported version

Author: auvipy

setup.py

@@ -34,7 +34,6 @@ def _pyimp():
     License :: OSI Approved :: BSD License
     Programming Language :: Python
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10