bump CI Python version to 3.10; remove pillow version workarounds

.github/workflows/precommit.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4.1.6
       - uses: actions/setup-python@v5.0.0
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - run: |
           pip install pre-commit
           pre-commit clean

.github/workflows/pypi.yml

@@ -58,10 +58,7 @@ jobs:
     strategy:
       matrix:
         platform: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ "3.9", "3.12" ]
-        exclude:
-          - platform: macos-14
-            python-version: "3.9"
+        python-version: [ "3.10", "3.12" ]
     runs-on: ${{ matrix.platform }}
     needs: [ package ]
     steps:

.github/workflows/readme_snippets.yml

@@ -25,7 +25,6 @@ jobs:
           python-version: "3.10"
       - run: python -m pip install $PIP_INSTALL_ARGS -e .
       - run: python -m pip install $PIP_INSTALL_ARGS pytest-codeblocks pytest
-      - run: python -m pip install $PIP_INSTALL_ARGS "pillow<11.3.0"  # matplotlib triggers deprecation warnings in 11.3.0
       - run: |
           python -c "import os,pytest_codeblocks; code=pytest_codeblocks.extract_from_file('docs/markdown/pysdm_landing.md'); f=open('readme.py', 'w', encoding='utf-8'); f.write('# coding: utf-8'+os.linesep); f.writelines(block.code for block in code if block.syntax=='Python'); f.close()"
       - run: cat -n readme.py
@@ -65,7 +64,7 @@ jobs:
       - uses: actions/checkout@v4.1.6
       - uses: actions/setup-python@v5.0.0
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - run: pip install -e .
       - run: pip install pytest-codeblocks pytest
       - run: python -c "import pytest_codeblocks; code=pytest_codeblocks.extract_from_file('docs/markdown/pysdm_landing.md'); f=open('readme.m', 'w'); f.writelines(block.code for block in code if block.syntax=='Matlab'); f.close()"

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         platform: [ ubuntu-24.04, macos-15-intel, macos-14, windows-latest ]
-        python-version: [ "3.9", "3.12" ]
+        python-version: [ "3.10", "3.12" ]
     runs-on: ${{ matrix.platform }}
     steps:
       - uses: actions/checkout@v4.1.6
@@ -45,7 +45,7 @@ jobs:
         python-version: ["3.12"]
         include: # for pylint
           - platform: ubuntu-24.04
-            python-version: "3.9"
+            python-version: "3.10"
     runs-on: ${{ matrix.platform }}
     steps:
       - uses: actions/checkout@v4.1.6
@@ -62,7 +62,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-24.04]
-        python-version: ["3.9"]
+        python-version: ["3.10"]
     runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v4.1.6
@@ -91,7 +91,7 @@ jobs:
     strategy:
       matrix:
         platform: [ ubuntu-24.04, macos-15-intel, macos-14, windows-latest ]
-        python-version: [ "3.9", "3.12" ]
+        python-version: [ "3.10", "3.12" ]
     runs-on: ${{ matrix.platform }}
     env:
       NUMBA_DISABLE_JIT: 1

examples/setup.py

@@ -28,7 +28,6 @@ def get_long_description():
         "open-atmos-jupyter-utils",
         "pystrict",
         "matplotlib",
-        "Pillow",
         "joblib",
         "ipywidgets",
         "seaborn",
@@ -45,7 +44,6 @@ def get_long_description():
             "open-atmos-jupyter-utils==1.3.0",
             "pystrict==1.3",
             "matplotlib!=3.9.1",
-            "Pillow<11.3.0",
             "joblib==1.5.1",
             "ipywidgets==8.1.7",
             "seaborn==0.13.2",

setup.py

@@ -44,7 +44,7 @@
 ]
 
 optional_dependencies = {
-    "unit-tests": ["pytest", "pytest-timeout", "matplotlib!=3.9.1", "Pillow<11.3.0"],
+    "unit-tests": ["pytest", "pytest-timeout", "matplotlib!=3.9.1"],
     "nonunit-tests": ["pytest", "PySDM-examples", "PyPartMC"],
     "CI_version_pins": [
         "PyPartMC==1.7.2",