Drop Python 3.7/3.8 from CI matrix, add 3.13

Python 3.7 and 3.8 are no longer available on ubuntu-latest (24.04),
causing all CI jobs to fail via fail-fast cancellation. Bump minimum
supported version to 3.9 and add 3.13 to the matrix.

Author: yairf11

.github/workflows/pytest.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, macos-latest ]
-        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11', '3.12' ]
+        python-version: [ '3.9', '3.10', '3.11', '3.12', '3.13' ]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4

setup.py

@@ -33,7 +33,7 @@ def find_version(*file_paths: str) -> str:
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.9",
     install_requires=[
         "typing_inspect",
         'pyyaml'