Update Python version requirement to 3.10+

Author: rashatwi

pyproject.toml

@@ -16,7 +16,6 @@ license = { text = "MIT" }
 keywords = ["MD", "analysis", "lammps"]
 classifiers = [
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -26,7 +25,7 @@ classifiers = [
     "Operating System :: OS Independent",
     "Topic :: Scientific/Engineering",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "numpy >= 1.21.1",
     "matplotlib >= 3.3.1",