Remove Python 3.9 from testing

Related to #35.

Author: eduardo-rodrigues

.github/workflows/test.yaml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v6