Dropped Python 3.9 support (EOL since October 2025)

Author: RolandBende

.github/workflows/test.yaml

@@ -12,7 +12,7 @@ jobs:
       matrix:
         os:
           - ubuntu-latest
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4

CHANGELOG.md

@@ -17,6 +17,10 @@
 
 - `migration_cli.py`: `--gcp-sa-json-dir` and `--gcp-sa-json-fname` CLI arguments were silently ignored due to both reading from `args.migrations_dir` instead of their own argument attributes
 
+### Removed
+
+- Dropped Python 3.9 support (EOL since October 2025). The updated security dependency chain (`cryptography>=46`, `cffi>=2.0`, `pycparser==3.0`) requires Python >=3.10. Minimum supported version is now Python 3.10
+
 ## 0.5.2.
 
 ### Feature

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "bigquery-migrations"
 dynamic = ["version", "readme"]
 description = "Simple tool for writing Google BigQuery migrations"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 keywords = ["migrations", "bigquery"]
 license = {file = "LICENSE"}
 authors = [
@@ -19,7 +19,10 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: Utilities"
 ]