Update Python version requirement to 3.9 and add support for Python 3.13 in pyproject.classifiers

Author: shoumikchow

pyproject.toml

@@ -7,7 +7,7 @@ name = "bbox_visualizer"
 version = "0.2.0"
 description = "Different ways of visualizing objects given bounding box data"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = { text = "MIT" }
 authors = [
     { name = "Shoumik Sharar Chowdhury", email = "shoumikchow@gmail.com" },
@@ -19,11 +19,11 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Natural Language :: English",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Scientific/Engineering :: Image Processing",
     "Topic :: Scientific/Engineering :: Visualization",
 ]