MNT: bump minimum Python version to 3.9.

Author: phmbressan

.github/workflows/lint_black.yaml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Install Python dependencies
         run: pip install black[jupyter]

.github/workflows/publish-to-pypi.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: "3.8"
+          python-version: "3.9"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip

.github/workflows/test_pytest.yaml

@@ -18,13 +18,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
-        python-version: [3.8, 3.12]
-        include:
-          - os: macos-latest
-            python-version: 3.12
-          - os: windows-latest
-            python-version: 3.12
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.9, 3.12]
     env:
       OS: ${{ matrix.os }}
       PYTHON: ${{ matrix.python-version }}

.pylintrc

@@ -88,7 +88,7 @@ persistent=yes
 
 # Minimum Python version to use for version dependent checks. Will default to
 # the version used to run pylint.
-py-version=3.8
+py-version=3.9
 
 # Discover python modules and packages in the file system subtree.
 recursive=no

docker-compose.yml

@@ -1,8 +1,8 @@
 version: '3.8'
 
 services:
-  python38-linux:
-    image: python:3.8
+  python39-linux:
+    image: python:3.9
     volumes:
       - .:/app
     working_dir: /app

docs/development/docker.rst

@@ -108,7 +108,7 @@ operational system.
 However, it is still useful to run the unit tests on different python versions.
 
 Currently, the `docker-compose.yml` file is configured to run the unit tests
-on python 3.8 and 3.12.
+on python 3.9 and 3.12.
 
 To run the unit tests on both python versions, run the following command
 **on your machine**:

docs/user/installation.rst

@@ -85,9 +85,9 @@ Requirements
 Python Version
 ^^^^^^^^^^^^^^
 
-RocketPy supports Python 3.8 and above.
+RocketPy supports Python 3.9 and above.
 Sorry, there are currently no plans to support earlier versions.
-If you really need to run RocketPy on Python 3.7 or earlier, feel free to submit an issue and we will see what we can do!
+If you really need to run RocketPy on Python 3.8 or earlier, feel free to submit an issue and we will see what we can do!
 
 Required Packages
 ^^^^^^^^^^^^^^^^^

pyproject.toml

@@ -4,7 +4,7 @@ version = "1.3.0.post1"
 description="Advanced 6-DOF trajectory simulation for High-Power Rocketry."
 dynamic = ["dependencies"]
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [
   {name = "Giovani Hidalgo Ceotto", email = "ghceotto@gmail.com"}
 ]