ci with cvxgrp actions

.github/workflows/ci.yml

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+name: "ci"
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        # mosek is not yet ready for '3.11'
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+        python-version: ['3.9', '3.10', '3.11' ]
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      - uses: cvxgrp/.github/actions/test@main
+        with:
+          os: ${{ matrix.os }}
+          python-version: ${{ matrix.python-version }}
+          source-folder: "dsp"
+      #- name: Coveralls GitHub Action
+      #  uses: coverallsapp/github-action@v2