Update and modify files for the project

- Updated files:
  - .github/workflows/main.yml
  - README.md

Author: Aviksaikat

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3
@@ -49,7 +49,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3
@@ -75,7 +75,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3

README.md

@@ -19,6 +19,7 @@
 </p>
 
 <p align="center">
+ <img src = "https://img.shields.io/badge/python-3.9+-blue.svg">
   <img src ="https://img.shields.io/badge/code%20style-black-000000.svg" alt="Code style: black"/>
   <img src ="https://img.shields.io/badge/imports-isort-17DE93.svg" alt="imports: isort"/>
   <img src = "https://www.mypy-lang.org/static/mypy_badge.svg">