Add GA build matrix for os and Python version

.github/workflows/main.yml

@@ -1,34 +1,34 @@
+# Same key-value pairs as in "Defining Our Workflow" section
 name: CI
-
-# We can specify which Github events will trigger a CI build
 on: push
-
-# now define a single job 'build' (but could define more)
 jobs:
-
   build:
 
-    # we can also specify the OS to run tests on
-    runs-on: ubuntu-latest
+    # Here we add the matrices definition:
+    strategy:
+      matrix:
+        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+        python-version: ["3.10", "3.11"]
 
-    # a job is a seq of steps
+    # Here we add the reference to the os matrix values
+    runs-on: ${{ matrix.os }}
+
+    # Same key-value pairs as in "Defining Our Workflow" section
     steps:
 
-    # Next we need to checkout out repository, and set up Python
-    # A 'name' is just an optional label shown in the log - helpful to clarify progress - and can be anything
     - name: Checkout repository
       uses: actions/checkout@v4
 
-    - name: Set up Python 3.11
+    - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: "3.11"
-
+        # Here we add the reference to the python-version matrix values
+        python-version: ${{ matrix.python-version }}
+    # Same steps as in "Defining Our Workflow" section
     - name: Install Python dependencies
       run: |
         python3 -m pip install --upgrade pip
         python3 -m pip install -r requirements.txt
-
     - name: Test with PyTest
       run: |
-        python3 -m pytest --cov=inflammation.models tests/test_models.py
+        python3 -m pytest --cov=catchment.models tests/test_models.py