Update Python version requirements in pyproject.toml

Author: xgarrido

pyproject.toml

@@ -24,13 +24,12 @@ classifiers = [
   "License :: OSI Approved :: BSD License",
   "Topic :: Scientific/Engineering :: Astronomy",
   "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
-  "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",
 ]
-requires-python = ">=3.9.0"
+requires-python = ">=3.10.0"
 dependencies = ["pixell>=0.29.0"]
 
 [project.optional-dependencies]