update of requirements and tests

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/devcontainers/python:1-3.12-bullseye
+FROM mcr.microsoft.com/devcontainers/python:1-3.13-bullseye
 
 ENV PYTHONUNBUFFERED 1
 

.github/workflows/testing.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   build:
     env:
-      USING_COVERAGE: "3.12"
+      USING_COVERAGE: "3.13"
       DATABASE_URL: "postgresql://postgres:postgres@localhost:5432/postgres"
     runs-on: ubuntu-latest
     services:
@@ -24,7 +24,7 @@ jobs:
       max-parallel: 10
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.13","3.12","3.11", "3.10", "3.9"]
+        python-version: ["3.13","3.12","3.11", "3.10"]
     steps:
       - uses: actions/checkout@v4
       - name: Wait for PostgreSQL to become ready

README.md

@@ -7,7 +7,7 @@ Python:
 
 Support Python Versions
 
-![Static Badge](https://img.shields.io/badge/Python-3.13%20%7C%203.12%20%7C%203.11%20%7C%203.10%20%7C%203.9-blue)
+![Static Badge](https://img.shields.io/badge/Python-3.13%20%7C%203.12%20%7C%203.11%20%7C%203.10-blue)
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 [![Coverage Status](https://raw.githubusercontent.com/devsetgo/devsetgo_lib/refs/heads/dev/coverage-badge.svg)](./reports/coverage/index.html)
 [![Tests Status](https://raw.githubusercontent.com/devsetgo/devsetgo_lib/refs/heads/dev/tests-badge.svg)](./reports/coverage/index.html)