Drop older versions of Python

.github/workflows/ci.yml

@@ -7,16 +7,10 @@ on:
 jobs:
   unit-tests:
     name: Test on Python v${{ matrix.python-version }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         include:
-          - pipenv-version: '2022.4.8'
-            python-version: '3.6'
-          - pipenv-version: '2022.4.8'
-            python-version: '3.7'
-          - pipenv-version: '2022.4.8'
-            python-version: '3.8'
           - pipenv-version: '2022.4.8'
             python-version: '3.9'
           - pipenv-version: '2023.2.4'

setup.py

@@ -91,13 +91,14 @@
 		'Operating System :: OS Independent',
 		#'Programming Language :: Python :: 3.4',  # dropped in v4.0
 		#'Programming Language :: Python :: 3.5',  # dropped in v4.0
-		'Programming Language :: Python :: 3.6',   # will be dropped in v5.0
-		'Programming Language :: Python :: 3.7',   # will be dropped in v5.0
-		'Programming Language :: Python :: 3.8',   # will be dropped in v5.0
+		#'Programming Language :: Python :: 3.6',  # dropped in v5.0
+		#'Programming Language :: Python :: 3.7',  # dropped in v5.0
+		#'Programming Language :: Python :: 3.8',  # dropped in v5.0
 		'Programming Language :: Python :: 3.9',
 		'Programming Language :: Python :: 3.10',
 		'Programming Language :: Python :: 3.11',
 		'Programming Language :: Python :: 3.12',
+		'Programming Language :: Python :: 3.13',
 		'Topic :: Software Development :: Libraries :: Python Modules'
 	]
 )