chore: update minimum Python version to 3.9

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" },
@@ -19,7 +19,6 @@ 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",