chore: drop python 3.9 (#2467)

Author: wpbonelli

.github/workflows/benchmark.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ 3.9, "3.10", "3.11", "3.12" ]
+        python-version: [ "3.10", "3.11", "3.12" ]
     defaults:
       run:
         shell: bash -l {0}

.github/workflows/codegen.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ 3.9, "3.10", "3.11", "3.12" ]
+        python-version: [ "3.10", "3.11", "3.12" ]
         ref: ["develop", "master", "6.4.1", "4458f9f", "4458f9f7a6244182e6acc2430a6996f9ca2df367"]
     defaults:
       run:

.github/workflows/commit.yml

@@ -71,7 +71,7 @@ jobs:
         shell: bash
     timeout-minutes: 10
     env:
-      PYTHON_VERSION: 3.9
+      PYTHON_VERSION: '3.10'
 
     steps:
       - name: Checkout repo
@@ -116,7 +116,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ 3.9, "3.10", "3.11", "3.12" ]
+        python-version: [ "3.10", "3.11", "3.12" ]
     defaults:
       run:
         shell: bash -l {0}

.github/workflows/examples.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ 3.9, "3.10", "3.11", "3.12" ]
+        python-version: [ "3.10", "3.11", "3.12" ]
     defaults:
       run:
         shell: bash -l {0}

.github/workflows/optional.yml

@@ -14,7 +14,7 @@ jobs:
         shell: bash
     timeout-minutes: 10
     env:
-      PYTHON_VERSION: 3.9
+      PYTHON_VERSION: '3.10'
     strategy:
       fail-fast: false
       matrix:

DEVELOPER.md

@@ -62,7 +62,7 @@ git config blame.ignoreRevsFile .git-blame-ignore-revs
 
 FloPy supports several recent versions of Python, loosely following [NEP 29](https://numpy.org/neps/nep-0029-deprecation_policy.html#implementation).
 
-Install Python >=3.9 via [standalone download](https://www.python.org/downloads/) or a distribution like [Anaconda](https://www.anaconda.com/products/individual) or [miniconda](https://docs.conda.io/en/latest/miniconda.html).
+Install Python >=3.10 via [standalone download](https://www.python.org/downloads/) or a distribution like [Anaconda](https://www.anaconda.com/products/individual) or [miniconda](https://docs.conda.io/en/latest/miniconda.html).
 
 Then install FloPy and core dependencies from the project root:
 

README.md

@@ -32,7 +32,7 @@ Documentation
 Installation
 -----------------------------------------------
 
-FloPy requires **Python** 3.9+ with:
+FloPy requires **Python** 3.10+ with:
 
 ```
 numpy >=1.20.3

pyproject.toml

@@ -18,14 +18,13 @@ classifiers = [
     "Intended Audience :: Science/Research",
     "License :: CC0 1.0 Universal (CC0 1.0) Public Domain Dedication",
     "Programming Language :: Python :: 3 :: Only",
-    "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 :: Scientific/Engineering :: Hydrology",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "numpy>=1.20.3",
     "matplotlib >=1.4.0",