Fix licence & classifier info for pypi

Author: danthedeckie

Diff for: LICENCE

@@ -1,4 +1,4 @@
-simpleeval - Copyright (c) 2013-2017 Daniel Fairhead
+simpleeval - Copyright (c) 2013-2024 Daniel Fairhead
 
 (MIT Licence)
 

Diff for: setup.cfg

@@ -6,10 +6,11 @@ author_email = danthedeckie@gmail.com
 description = A simple, safe single expression evaluator library.
 keywords = eval, simple, expression, parse, ast
 url = https://github.com/danthedeckie/simpleeval
+license = MIT
 long_description = file: README.rst
 long_description_content_type = text/x-rst
 classifiers =
-    Development Status :: Development Status :: 5 - Production/Stable
+    Development Status :: 5 - Production/Stable
     Intended Audience :: Developers
     License :: OSI Approved :: MIT License
     Topic :: Software Development :: Libraries :: Python Modules