Mark Python 3.13 as officially supported (#1192)

Make Python 3.13 officially support

This change updates the unit testing to only use released
versions of Python 3.13. It also updates the PyPI classifier
to declare 3.13 support.

Signed-off-by: Eric Brown <eric_wade_brown@yahoo.com>

.github/workflows/pythonpackage.yml

@@ -51,7 +51,7 @@ jobs:
           ["3.10", "310"],
           ["3.11", "311"],
           ["3.12", "312"],
-          ["3.13.0-a - 3.13", "313"],
+          ["3.13", "313"],
         ]
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}

setup.cfg

@@ -22,6 +22,7 @@ classifier =
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: 3 :: Only
     Topic :: Security
 project_urls =