Add matrix CI Tests on multiple Python versions and OS versions

.github/workflows/matrix_ci.yml

@@ -0,0 +1,53 @@
+name: Matrix Testing CI
+# this is similar to the pyart CI action
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+# This job installs dependencies and runs tests across a matrix of python and OS versions.
+#Add if: github.repository == 'tobac-project/tobac' to limit runs to tobac repo
+
+jobs:
+  build:
+    name: ${{ matrix.os }}-${{ matrix.python-version }}
+    runs-on: ${{ matrix.os }}-latest
+    if: github.repository == 'tobac-project/tobac'
+    defaults:
+      run:
+        shell: bash -l {0}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        os: [macos, ubuntu, windows]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      # Install micromamba and dependencies
+      - name: Setup Conda Environment
+        uses: mamba-org/setup-micromamba@v1
+        with:
+          environment-file: environment-ci.yml
+          activate-environment: pyart-dev
+          cache-downloads: true
+          channels: conda-forge
+          channel-priority: strict
+          python-version: ${{ matrix.python-version }}
+
+      - name: Fetch all history for all tags and branches
+        run: |
+           git fetch --prune --unshallow
+
+      - name: Install tobac
+        shell: bash -l {0}
+        run: |
+          python -m pip install -e . --no-deps --force-reinstall
+
+      - name: Run Tests
+        id: run_tests
+        shell: bash -l {0}
+        run: |
+          python -m pytest -v 

environment-ci.yml

@@ -0,0 +1,15 @@
+name: pyart-dev
+channels:
+  - conda-forge
+dependencies:
+  - numpy
+  - scipy
+  - scikit-image
+  - scikit-learn
+  - pandas
+  - matplotlib
+  - iris
+  - xarray
+  - cartopy
+  - trackpy
+  - pytest