Merge branch 'remove_python_3.9' into add_lookback_days

Author: iannuzzelli

.github/workflows/python-package.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        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@v2

setup.py

@@ -60,7 +60,6 @@
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
         "Operating System :: POSIX",
         "Operating System :: Unix",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",