Drop Python 3.9 so CI runs on ubuntu-latest again

.github/workflows/main.yml

@@ -19,14 +19,11 @@ jobs:
           - "windows-latest"
           - "macos-latest"
         python:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
         include:
-          - python: "3.9"
-            tox-env: "py39"
           - python: "3.10"
             tox-env: "py310"
           - python: "3.11"

README.md

@@ -17,7 +17,7 @@ Versions of this package up to 1.0.1 were different, unrelated project, that is
 
 ### Prerequisites
 
-- Python version 3.9+
+- Python version 3.10+
 
 ### Install package
 
@@ -309,7 +309,7 @@ To setup virtual environments, run tests and linters use:
 tox
 ```
 
-It will create virtual environments with all installed dependencies for each available python interpreter (starting from `python3.9`) on your machine.
+It will create virtual environments with all installed dependencies for each available python interpreter (starting from `python3.10`) on your machine.
 By default, they will be available in `{project}/.tox/` directory. So, for instance, to activate `python3.11` environment, run the following:
 
 ```bash

pyproject.toml

@@ -10,13 +10,12 @@ classifiers = [
     "Operating System :: OS Independent",
     "Topic :: Software Development :: Libraries :: Application Frameworks",
     "Programming Language :: Python :: 3",
-    "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",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dynamic = ["dependencies"]
 
 [project.urls]

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 isolated_build = true
 envlist =
-    py{39,310,311,312,313},
+    py{310,311,312,313},
     pre-commit
     mypy
 skip_missing_interpreters = true