Require python 3.9 or higher

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 2
       matrix:
-        python-version: [3.11]
+        python-version: ["3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v4

pyproject.toml

@@ -10,7 +10,7 @@ license = { text = "MIT" }
 authors = [
     { name = "City Bureau", email = "[email protected]" }
 ]
-requires-python = ">=3.6,<4.0"
+requires-python = ">=3.9,<4.0"
 dependencies = [
     "jsonschema>=3.0.0a5",
     "pytz",
@@ -39,9 +39,6 @@ Intended Audience :: Developers
 License :: OSI Approved :: MIT License
 Programming Language :: Python
 Programming Language :: Python :: 3
-Programming Language :: Python :: 3.6
-Programming Language :: Python :: 3.7
-Programming Language :: Python :: 3.8
 Programming Language :: Python :: 3.9
 Programming Language :: Python :: 3.10
 Programming Language :: Python :: 3.11