dropped python 3.9 support

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       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@v4
 
@@ -112,7 +112,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu, macos, windows]
-        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
 

pyproject.toml

@@ -7,7 +7,7 @@ name = "xgi"
 dynamic = ["version"]
 description = "XGI is a Python package for higher-order networks."
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = {file = "LICENSE.md"}
 authors = [
     {name = "XGI Developers", email = "[email protected]"}
@@ -30,7 +30,6 @@ classifiers = [
     "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -43,7 +42,7 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Physics",
 ]
 dependencies = [
-    "numpy>=1.20",
+    "numpy>=1.23.5",
     "scipy>=1.15",
     "pandas>=1.3",
     "networkx>=2.7",

requirements/default.txt

@@ -1,6 +1,6 @@
 # Generated via tools/generate_requirements.py and pre-commit hook.
 # Do not edit this file; modify pyproject.toml instead.
-numpy>=1.20
+numpy>=1.23.5
 scipy>=1.15
 pandas>=1.3
 networkx>=2.7