Fix pyproject.toml

Author: WrathfulSpatula

pyproject.toml

@@ -9,6 +9,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "FindAFactor"
 version = "3.8.0"
+requires-python = ">=3.8"
 description = "Find any nontrivial factor of a number"
 readme = {file = "README.txt", content-type = "text/markdown"}
 license = {text = "MIT"}