Fix pelican.themes.reflex import

pkg_resources has been deprecated for many Python versions, and is not
available since Python 3.12.

Author: Fidel Ramos

pelican/themes/reflex/__init__.py

@@ -2,12 +2,12 @@
 Reflex theme for Pelican static site generator
 '''
 
-from pkg_resources import resource_filename
+from importlib.resources import files
 
 
 def path():
     '''
     Return path to theme templates and assets.
     Use this as value for THEME in Pelican settings.
     '''
-    return resource_filename(__name__, '')
+    return str(files(__name__))

pyproject.toml

@@ -18,7 +18,7 @@ classifiers = [
     "Topic :: Internet :: WWW/HTTP :: Dynamic Content :: Content Management System",
     "Topic :: Text Processing :: Markup :: HTML",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 [project.urls]
 Homepage = "https://github.com/haplo/python-theme-reflex"