chore: remove Python 3.8 references

- drop support for python 3.8 and set Python 3.9 as the minimum supported python version.

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-         python-version: ['3.8', '3.12']
+         python-version: ['3.9', '3.12']
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python

changelog.d/20241111_171418_faraz.maqsood_remove_py38_references.md

@@ -0,0 +1 @@
+- 💥 [Deprecation] Drop support for python 3.8 and set Python 3.9 as the minimum supported python version. (by @Faraz32123)

setup.py

@@ -43,7 +43,7 @@ setup(
     long_description_content_type="text/x-rst",
     packages=find_packages(exclude=["tests*"]),
     include_package_data=True,
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     install_requires=["tutor>=18.0.0,<19.0.0", "tutor-discovery>=18.0.0,<19.0.0", "tutor-mfe>=18.0.0,<19.0.0"],
     extras_require={"dev": ["tutor[dev]>=18.0.0,<19.0.0"]},
     entry_points={"tutor.plugin.v1": ["credentials = tutorcredentials.plugin"]},
@@ -53,7 +53,6 @@ setup(
         "License :: OSI Approved :: GNU Affero General Public License v3",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",