chore: Drop support for Python 3.8

- Stop running **tests** for Python **3.8** in CI/CD.
- Remove **explicit** support for Python **3.8** from
  Python project configuration (`setup.py`, `setup.cfg`, and/or `pyproject.toml`).
- Compile Python **dependency manifests** with the **next highest**
  Python version (**3.9**).
- Remove Python **3.8** from **Black** configuration.

Reasons for this change:

- The end of support date of Python **3.8** is **2024-10-07**:
  - [PEP 569 – Python 3.8 Release Schedule → 3.8 Lifespan](https://peps.python.org/pep-0569/#lifespan)
  - [Status of Python versions](https://devguide.python.org/versions/)
- Dependabot end-of-support date for Python **3.8** is **2025-02-05**:
  - [Closing down notice: Dependabot will no longer support Python version 3.8 ← GitHub Changelog](https://github.blog/changelog/2025-01-06-closing-down-notice-dependabot-will-no-longer-support-python-version-3-8/)

Ref: https://app.shortcut.com/cordada/story/12613

Author: fpinto-cdd

.black.cfg.toml

@@ -9,4 +9,4 @@
 include = '\.pyi?$'
 line-length = 100
 skip-string-normalization = true
-target-version = ['py38', 'py39', 'py310']
+target-version = ['py39', 'py310']

.github/workflows/ci.yaml

@@ -28,7 +28,6 @@ jobs:
     strategy:
       matrix:
         python_version:
-          - "3.8"
           - "3.9"
           - "3.10"
 
@@ -73,7 +72,6 @@ jobs:
     strategy:
       matrix:
         python_version:
-          - "3.8"
           - "3.9"
           - "3.10"
 
@@ -138,7 +136,7 @@ jobs:
 
       - name: Check that compiled Python dependency manifests are up-to-date with their sources
         # FIXME: There are issues related to testing with multiple Python versions.
-        if: ${{ startsWith(steps.set_up_python.outputs.python-version, '3.8.') }}
+        if: ${{ startsWith(steps.set_up_python.outputs.python-version, '3.9.') }}
         run: |
           source "$PYTHON_VIRTUALENV_ACTIVATE"
           make python-deps-sync-check

mypy.ini

@@ -1,5 +1,5 @@
 [mypy]
-python_version = 3.8
+python_version = 3.9
 platform = linux
 mypy_path =
     src

pyproject.toml

@@ -43,7 +43,6 @@ classifiers = [
   "License :: OSI Approved :: MIT License",
   "Natural Language :: English",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
 ]

requirements-dev.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.8
+# This file is autogenerated by pip-compile with Python 3.9
 # by the following command:
 #
 #    pip-compile --allow-unsafe --strip-extras requirements-dev.in
@@ -182,7 +182,6 @@ typing-extensions==4.12.2
     #   -c requirements.txt
     #   black
     #   mypy
-    #   rich
     #   tox
     #   types-lxml
 urllib3==1.26.19

requirements.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.8
+# This file is autogenerated by pip-compile with Python 3.9
 # by the following command:
 #
 #    pip-compile --allow-unsafe --strip-extras requirements.in
@@ -12,11 +12,6 @@ attrs==23.2.0
     # via
     #   jsonschema
     #   referencing
-backports-zoneinfo==0.2.1 ; python_version < "3.9"
-    # via
-    #   -r requirements.in
-    #   django
-    #   djangorestframework
 certifi==2024.7.4
     # via signxml
 cffi==1.16.0
@@ -39,10 +34,6 @@ djangorestframework==3.15.2
     # via -r requirements.in
 importlib-metadata==8.5.0
     # via -r requirements.in
-importlib-resources==6.4.0
-    # via
-    #   jsonschema
-    #   jsonschema-specifications
 jsonschema==4.23.0
     # via -r requirements.in
 jsonschema-specifications==2023.12.1
@@ -55,8 +46,6 @@ marshmallow==3.22.0
     # via -r requirements.in
 packaging==24.1
     # via marshmallow
-pkgutil-resolve-name==1.3.10
-    # via jsonschema
 pycparser==2.22
     # via cffi
 pydantic==2.10.6
@@ -82,12 +71,9 @@ sqlparse==0.5.0
 typing-extensions==4.12.2
     # via
     #   -r requirements.in
-    #   annotated-types
     #   asgiref
     #   pydantic
     #   pydantic-core
     #   pyopenssl
 zipp==3.20.2
-    # via
-    #   importlib-metadata
-    #   importlib-resources
+    # via importlib-metadata

tox.ini

@@ -1,6 +1,5 @@
 [tox]
 envlist =
-    py38,
     py39,
     py310,
 
@@ -12,6 +11,5 @@ deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/requirements-dev.txt
 basepython =
-    py38: python3.8
     py39: python3.9
     py310: python3.10