Reenable 3.9

Author: honnibal

.github/workflows/tests.yml

@@ -21,7 +21,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, windows-latest, macos-13]
-        python_version: ["3.10", "3.11", "3.12"]
+        python_version: ["3.9", "3.10", "3.11", "3.12"]
     runs-on: ${{ matrix.os }}
 
     steps:

setup.py

@@ -368,6 +368,7 @@ def chdir(new_dir):
         "Operating System :: POSIX :: Linux",
         "Operating System :: MacOS :: MacOS X",
         "Programming Language :: Cython",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",