Bump to 3.0.0 and supported versions to Python 3.9

Author: JamesParrott

setup.cfg

@@ -16,15 +16,14 @@ keywords = gis, geospatial, geographic, shapefile, shapefiles
 classifiers =
     Development Status :: 5 - Production/Stable
     Programming Language :: Python
-    Programming Language :: Python :: 2.7
-    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.9
     Topic :: Scientific/Engineering :: GIS
     Topic :: Software Development :: Libraries
     Topic :: Software Development :: Libraries :: Python Modules
 
 [options]
 py_modules = shapefile
-python_requires = >=2.7
+python_requires = >=3.9
 
 [bdist_wheel]
 universal=1

shapefile.py

@@ -8,7 +8,7 @@
 
 from __future__ import annotations
 
-__version__ = "2.4.0"
+__version__ = "3.0.0-alpha"
 
 import array
 import doctest