chore: bump min Python to 3.9

Author: sfc-gh-twhite

pyproject.toml

@@ -7,7 +7,7 @@ name = "schemachange"
 version = "4.0.1"
 description = "A Database Change Management tool for Snowflake"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = {text = "Apache-2.0"}
 authors = [
     {name = "jamesweakley/jeremiahhansen"},
@@ -17,7 +17,6 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -62,7 +61,7 @@ include = [
 
 [tool.ruff]
 line-length = 120
-target-version = "py38"
+target-version = "py39"
 
 [tool.ruff.lint]
 select = [
@@ -86,4 +85,4 @@ python_functions = ["test_*"]
 
 [tool.black]
 line-length = 120
-target-version = ["py38", "py39", "py310", "py311", "py312"]
+target-version = ["py39", "py310", "py311", "py312"]