also drop support for 3.8 so that we can use poetry 2

Author: mshafer-NI

poetry.lock

@@ -13,7 +13,7 @@ include = ["ni_python_styleguide/config.toml"]
 
 
 [tool.poetry.dependencies]
-python = "^3.8"
+python = "^3.9"
 pathspec = ">=0.11.1"
 
 # Tools we aggregate
@@ -39,7 +39,6 @@ flake8-black = ">=0.2.1"
 flake8-docstrings = ">=1.5.0"
 flake8-import-order = ">=0.18.1,<0.19.0" # we're not compatible with 0.19.0 yet due to #226
 flake8-tidy-imports = [
-    {version = ">=4.4.1", python = ">=3.7,<3.9"},
     {version=">=4.11.0", python="^3.9"},
 ]
 pep8-naming = ">=0.11.1"