Update pyproject.toml

+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
 [tool.poetry]
 name = "txtint"
 version = "0.1.2"

 license = "BSD-2-Clause"
 packages = [{include="txt.py"}]
 
+[[tool.poetry.source]]
+name = "main"
+url = "https://ragt.ag/code/pypi"
+
 [tool.poetry.dependencies]
-python = ">=3.8,<3.11"
+python = ">=3.9,<3.11"
 argcomplete = "^2.0.0"
 rich = "^13.2.0"
 
 [tool.poetry.group.dev.dependencies]
 gmpg = {path="../gmpg", develop=true}
-
-# [[tool.poetry.source]]
-# name = "main"
-# url = "https://ragt.ag/code/pypi"
-
-[build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"