Remove Python3.9

Author: honnibal

.github/workflows/tests.yml

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