feat: Drop support for unsupported Python versions (#53)

Author: kesara

.github/workflows/pr-checks.yml

@@ -41,12 +41,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
-        include:
-          - platform: ubuntu-20.04
-            python-version: 3.6
-          - platform: ubuntu-22.04
-            python-version: 3.7
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - name: Checkout repository

setup.py

@@ -57,13 +57,11 @@
 
         # Specify the Python versions you support here. In particular, ensure
         # that you indicate whether you support Python 2, Python 3 or both.
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
         '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',
     ],
 
     # What does your project relate to?

tox.ini

@@ -4,14 +4,10 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py{27,36,37,38,39,310,311,312,313}-{linux,macos,windows}
+envlist = py{39,310,311,312,313}-{linux,macos,windows}
 
 [gh-actions]
 python =
-	2.7: py27
-	3.6: py36
-	3.7: py37
-	3.8: py38
 	3.9: py39
 	3.10: py310
 	3.11: py311